diff --git a/package-lock.json b/package-lock.json
index 4df99b75..72fd20c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1017,12 +1017,6 @@
           "requires": {
             "ms": "^2.1.1"
           }
-        },
-        "ms": {
-          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
-          "dev": true
         }
       }
     },
@@ -1136,19 +1130,6 @@
         "entities": "^1.1.1",
         "inherits": "^2.0.1",
         "readable-stream": "^3.1.1"
-      },
-      "dependencies": {
-        "readable-stream": {
-          "version": "3.4.0",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.4.0.tgz",
-          "integrity": "sha512-jItXPLmrSR8jmTRmRWJXCnGJsfy85mB3Wd/uINMXA65yrnFo0cPClFIUWzo2najVNSl+mx7/4W8ttlLWJe99pQ==",
-          "dev": true,
-          "requires": {
-            "inherits": "^2.0.3",
-            "string_decoder": "^1.1.1",
-            "util-deprecate": "^1.0.1"
-          }
-        }
       }
     },
     "http-proxy": {
@@ -1350,12 +1331,6 @@
       "integrity": "sha1-6PvzdNxVb/iUehDcsFctYz8s+hA=",
       "dev": true
     },
-    "isomorphic.js": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/isomorphic.js/-/isomorphic.js-0.1.0.tgz",
-      "integrity": "sha512-qoOHpuSbJ56TlPR+vi0xRxdhNBbh/xFbgjB2d+ysekcM5iSh9jzxHURnACQxy0Sb9SnZhxxo9EyN+XbGcQhkAg==",
-      "dev": true
-    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -1888,14 +1863,6 @@
       "requires": {
         "minimist": "~0.0.1",
         "wordwrap": "~0.0.2"
-      },
-      "dependencies": {
-        "wordwrap": {
-          "version": "0.0.3",
-          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
-          "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
-          "dev": true
-        }
       }
     },
     "optionator": {
@@ -2113,12 +2080,6 @@
           "requires": {
             "ms": "^2.1.1"
           }
-        },
-        "ms": {
-          "version": "2.1.2",
-          "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
-          "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==",
-          "dev": true
         }
       }
     },
@@ -2265,6 +2226,17 @@
         }
       }
     },
+    "readable-stream": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.4.0.tgz",
+      "integrity": "sha512-jItXPLmrSR8jmTRmRWJXCnGJsfy85mB3Wd/uINMXA65yrnFo0cPClFIUWzo2najVNSl+mx7/4W8ttlLWJe99pQ==",
+      "dev": true,
+      "requires": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      }
+    },
     "regexpp": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-2.0.1.tgz",
@@ -2779,6 +2751,12 @@
       "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
       "dev": true
     },
+    "wordwrap": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.3.tgz",
+      "integrity": "sha1-o9XabNXAvAAI03I0u68b7WMFkQc=",
+      "dev": true
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
@@ -2813,17 +2791,6 @@
       "dev": true,
       "requires": {
         "lib0": "^0.2.3"
-      },
-      "dependencies": {
-        "lib0": {
-          "version": "0.2.3",
-          "resolved": "https://registry.npmjs.org/lib0/-/lib0-0.2.3.tgz",
-          "integrity": "sha512-J1Gw9PT78tO3QODgvzk9NVTXTXTsru9LKq+iPOdWw5s1/QiapUKmCJMCWBrNSGkJ0f3WQkZJtGzn3azJwMDdeg==",
-          "dev": true,
-          "requires": {
-            "isomorphic.js": "^0.1.0"
-          }
-        }
       }
     }
   }
diff --git a/src/utils/PermanentUserData.js b/src/utils/PermanentUserData.js
index 0040c4a6..c753a8ce 100644
--- a/src/utils/PermanentUserData.js
+++ b/src/utils/PermanentUserData.js
@@ -5,6 +5,7 @@ import {
   readDeleteSet,
   writeDeleteSet,
   createDeleteSet,
+  applyUpdate,
   ID, DeleteSet, YArrayEvent, Transaction, Doc // eslint-disable-line
 } from '../internals.js'
 
@@ -15,15 +16,14 @@ import { mergeDeleteSets, isDeleted } from './DeleteSet.js'
 export class PermanentUserData {
   /**
    * @param {Doc} doc
-   * @param {string} key
+   * @param {YMap<any>} [storeType]
    */
-  constructor (doc, key = 'users') {
-    const users = doc.getMap(key)
+  constructor (doc, storeType = doc.getMap('users')) {
     /**
      * @type {Map<string,DeleteSet>}
      */
     const dss = new Map()
-    this.yusers = users
+    this.yusers = storeType
     this.doc = doc
     /**
      * Maps from clientid to userDescription
@@ -59,21 +59,23 @@ export class PermanentUserData {
       ids.forEach(addClientId)
     }
     // observe users
-    users.observe(event => {
+    storeType.observe(event => {
       event.keysChanged.forEach(userDescription =>
-        initUser(users.get(userDescription), userDescription)
+        initUser(storeType.get(userDescription), userDescription)
       )
     })
     // add intial data
-    users.forEach(initUser)
+    storeType.forEach(initUser)
   }
 
   /**
    * @param {Doc} doc
    * @param {number} clientid
    * @param {string} userDescription
+   * @param {Object} conf
+   * @param {function(Transaction, DeleteSet):boolean} [conf.filter]
    */
-  setUserMapping (doc, clientid, userDescription) {
+  setUserMapping (doc, clientid, userDescription, { filter = () => true }) {
     const users = this.yusers
     let user = users.get(userDescription)
     if (!user) {
@@ -109,7 +111,7 @@ export class PermanentUserData {
       setTimeout(() => {
         const yds = user.get('ds')
         const ds = transaction.deleteSet
-        if (transaction.local && ds.clients.size > 0) {
+        if (transaction.local && ds.clients.size > 0 && filter(transaction, ds)) {
           const encoder = encoding.createEncoder()
           writeDeleteSet(encoder, ds)
           yds.push([encoding.toUint8Array(encoder)])