Project/Issue: portal users: public or (portal and colleagues following) or (followers and following) ['|', '|', ('project_id.privacy_visibility', 'in', ['public']), '&', ('project_id.privacy_visibility', '=', 'portal'), ('message_follower_ids', 'child_of', [user.partner_id.commercial_partner_id.id]), '&', ('project_id.privacy_visibility', '=', 'followers'), ('message_follower_ids', 'in', [user.partner_id.id]), ] Project/Issue: employees: public, portal, employee or (followers and following) ['|', ('project_id.privacy_visibility', 'in', ['public', 'portal', 'employees']), '&', ('project_id.privacy_visibility', '=', 'followers'), ('message_follower_ids', 'in', [user.partner_id.id]), ] Project/Issue: public users: public only [('project_id.privacy_visibility', '=', 'public')]