Showing user portal categories based on permissions

Hi

I would really appreciate an option or setting where you can decide whether a user sees a specific user portal request type or not.

For example:
I would like to create a request type where a team leader can request the removal of a user's information because the employee has left the company.

Now it wouldn't make sense if everyone can see this request type because this is clearly an administrative task.

What I would wish for:
I create a group called "Team Leaders" and add all team leaders. Now I go to the request type and say "Only show this request type to users in group: Team Leaders".

Same functionality for the categories would be nice too!

Regards