Project: employees: public, portal, employees or following ['|', ('privacy_visibility', 'in', ['public', 'portal', 'employees']), '&', ('privacy_visibility', '=', 'followers'), ('message_follower_ids', 'in', [user.partner_id.id]), ] Project: portal users: public, portal or following ['|', ('privacy_visibility', 'in', ['public', 'portal']), '&', ('privacy_visibility', '=', 'followers'), ('message_follower_ids', 'in', [user.partner_id.id]), ] Project: anonymous users: public only [('privacy_visibility', '=', 'public')] Project/Task: employees: public, portal, employee or following or assigned ['|', ('user_id', '=', user.id), '|', ('project_id.privacy_visibility', 'in', ['public', 'portal', 'employees']), '&', ('project_id.privacy_visibility', '=', 'followers'), ('message_follower_ids', 'in', [user.partner_id.id]), ] Project/Task: portal users: public or portal and following ['|', ('project_id.privacy_visibility', '=', 'public'), '&', ('project_id.privacy_visibility', 'in', ['portal', 'followers']), '|', ('message_follower_ids','in', [user.partner_id.id]), ('user_id', '=', user.id), ] Project/Task: anonymous users: public only [('project_id.privacy_visibility', '=', 'public')]