Designer Can Access Add-Ons

Hey guys,

Can you tell me how make Designer not to access add-ons, I made him administrator account with permissions to see only design details, however when I login to that account I can see some specific add-ons full access.

I made quick solution, however something is wrong. I can select Add-ons to restrict rules but it doesn't work.

Just add: $auth['user_id'] == in /app/addons/xxx-add/controllers/backend