diff -r 98c229b8cb4a trytond/trytond/modules/stock/inventory.xml
--- a/trytond/trytond/modules/stock/inventory.xml     Mon Apr 23 17:29:56 2018 +0200
+++ b/trytond/trytond/modules/stock/inventory.xml     Fri May 11 13:46:51 2018 +0200
@@ -60,6 +60,15 @@
             <field name="name">inventory_line_tree</field>
         </record>

+        <record model="ir.rule.group" id="rule_group_inventory">
+            <field name="model" search="[('model', '=', 'stock.inventory')]"/>
+            <field name="global_p" eval="True"/>
+        </record>
+        <record model="ir.rule" id="rule_inventory">
+            <field name="domain" eval="[('company', 'in', Eval('user', {}).get('companies', []))]" pyson="1"/>
+            <field name="rule_group" ref="rule_group_inventory"/>
+        </record>
+
         <record model="ir.model.access" id="access_inventory">
             <field name="model" search="[('model', '=', 'stock.inventory')]"/>
             <field name="perm_read" eval="False"/>