diff --git a/__init__.py b/__init__.py
index 5439e0e..80f7161 100644
--- a/__init__.py
+++ b/__init__.py
@@ -17,6 +17,7 @@ from .reconciliation import Reconciliation
 from .cbreport import ReconciliationReport
 from .currency import CurrencyRate
 from .model import MemCache
+from .ir import Rule
 
 
 def register():
@@ -35,6 +36,7 @@ def register():
         OpenCashBookStart,
         RunCbReportStart,
         EnterBookingStart,
+        Rule,
         module='cashbook', type_='model')
     Pool.register(
         ReconciliationReport,
diff --git a/book.xml b/book.xml
index 4520409..b455f14 100644
--- a/book.xml
+++ b/book.xml
@@ -121,7 +121,7 @@ full copyright notices and license terms. -->
         </record>
         <record model="ir.rule" id="rg_book_rw_owner-1">
             <field name="domain" eval="[
-                ('owner.id', '=', Eval('user', {}).get('id', -1)),
+                ('owner.id', '=', Eval('user_id', -1)),
                 ]" pyson="1"/>
             <field name="rule_group" ref="rg_book_rw_owner"/>
         </record>
diff --git a/ir.py b/ir.py
new file mode 100644
index 0000000..7aa9aca
--- /dev/null
+++ b/ir.py
@@ -0,0 +1,27 @@
+# -*- coding: utf-8 -*-
+# This file is part of the cashbook-module from m-ds.de for Tryton.
+# The COPYRIGHT file at the top level of this repository contains the
+# full copyright notices and license terms.
+
+from trytond.transaction import Transaction
+from trytond.pool import PoolMeta
+
+
+class Rule(metaclass=PoolMeta):
+    __name__ = 'ir.rule'
+
+    @classmethod
+    def _get_context(cls, model_name):
+        context = super()._get_context(model_name)
+        if model_name in {'cashbook.book', 'cashbook.line', 'cashbook.recon'}:
+            context['user_id'] = Transaction().user
+        return context
+
+    @classmethod
+    def _get_cache_key(cls, model_name):
+        key = super()._get_cache_key(model_name)
+        if model_name in {'cashbook.book', 'cashbook.line', 'cashbook.recon'}:
+            key = (*key, Transaction().user)
+        return key
+
+# end Rule
diff --git a/line.xml b/line.xml
index e618696..624fbfd 100644
--- a/line.xml
+++ b/line.xml
@@ -145,7 +145,7 @@ full copyright notices and license terms. -->
         </record>
         <record model="ir.rule" id="rg_line_write-1">
             <field name="domain" eval="['OR',
-                    ('cashbook.owner.id', '=', Eval('user', {}).get('id', -1)),
+                    ('cashbook.owner.id', '=', Eval('user_id', -1)),
                     ('cashbook.reviewer.id', 'in', Eval('groups', [])),
                 ]" pyson="1"/>
             <field name="rule_group" ref="rg_line_write"/>
diff --git a/reconciliation.xml b/reconciliation.xml
index ca2f603..530a1ca 100644
--- a/reconciliation.xml
+++ b/reconciliation.xml
@@ -96,7 +96,7 @@ full copyright notices and license terms. -->
         </record>
         <record model="ir.rule" id="rg_recon_write-1">
             <field name="domain" eval="['OR',
-                    ('cashbook.owner.id', '=', Eval('user', {}).get('id', -1)),
+                    ('cashbook.owner.id', '=', Eval('user_id', -1)),
                     ('cashbook.reviewer.id', 'in', Eval('groups', [])),
                 ]" pyson="1"/>
             <field name="rule_group" ref="rg_recon_write"/>
diff --git a/splitline.xml b/splitline.xml
index 4ab74c0..fefec00 100644
--- a/splitline.xml
+++ b/splitline.xml
@@ -80,7 +80,7 @@ full copyright notices and license terms. -->
         </record>
         <record model="ir.rule" id="rg_split_write-1">
             <field name="domain" eval="['OR',
-                    ('line.cashbook.owner.id', '=', Eval('user', {}).get('id', -1)),
+                    ('line.cashbook.owner.id', '=', Eval('user_id', -1)),
                     ('line.cashbook.reviewer.id', 'in', Eval('groups', [])),
                 ]" pyson="1"/>
             <field name="rule_group" ref="rg_split_write"/>