diff --git a/addons/project/project_view.xml b/addons/project/project_view.xml
index 16dbe44ccc1..aa27a6bb6cc 100644
--- a/addons/project/project_view.xml
+++ b/addons/project/project_view.xml
@@ -329,7 +329,7 @@
                         <field colspan="4" name="name"/>
                         <field name="hours" widget="float_time"/>
                         <field name="date"/>
-                        <field name="user_id" options='{"no_open": True}'/>
+                        <field name="user_id" options='{"no_open": True}' context="{'default_groups_ref': ['base.group_user', 'project.group_project_user']}"/>
                         <field name="company_id" groups="base.group_multi_company" widget="selection"/>
                     </group>
                 </form>
@@ -344,7 +344,7 @@
                     <field name="date"/>
                     <field name="name"/>
                     <field name="hours" widget="float_time"/>
-                    <field name="user_id"/>
+                    <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'project.group_project_user']}"/>
                 </tree>
             </field>
         </record>
@@ -406,7 +406,7 @@
                                     <field name="name"/>
                                     <field name="hours" widget="float_time" sum="Spent Hours"/>
                                     <field name="date"/>
-                                    <field name="user_id"/>
+                                    <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'project.group_project_user']}"/>
                                 </tree>
                             </field>
                             <group>
diff --git a/addons/project/wizard/project_task_delegate_view.xml b/addons/project/wizard/project_task_delegate_view.xml
index 700740d12f3..4f2954e2f20 100644
--- a/addons/project/wizard/project_task_delegate_view.xml
+++ b/addons/project/wizard/project_task_delegate_view.xml
@@ -17,7 +17,7 @@
                             <field name="new_task_description" colspan="2" nolabel="1"/>
                         </group>
                         <group>
-                            <field name="user_id"/>
+                            <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'project.group_project_user']}"/>
                             <separator string="Validation Task" colspan="2"/>
                             <field name="prefix" string="Validation Task Title"/>
                             <field name="planned_hours_me"/>
diff --git a/addons/project_long_term/project_long_term_view.xml b/addons/project_long_term/project_long_term_view.xml
index 4066b6133c1..fe86f21f4ba 100644
--- a/addons/project_long_term/project_long_term_view.xml
+++ b/addons/project_long_term/project_long_term_view.xml
@@ -33,7 +33,7 @@
             <field name="arch" type="xml">
                 <form string="Project User Allocation" version="7.0">
                     <group col="4">
-                        <field name="user_id"/>
+                        <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'project.group_project_manager']}"/>
                         <field name="phase_id"/>
                         <field name="project_id"/>
                         <field name="date_start"/>
@@ -174,7 +174,7 @@
                         <page string="Team Planning">
                             <field name="user_ids">
                                  <tree editable="bottom" string="Project Users">
-                                      <field name="user_id"/>
+                                      <field name="user_id" context="{'default_groups_ref': ['base.group_user', 'project.group_project_manager']}"/>
                                       <field name="date_start"/>
                                       <field name="date_end"/>
                                   </tree>