i'll explain my problem in the next example:
there are 4 users ( user1, user2, user3, user4 ). User1 and user 3 need to have a guaranteed traffic flow, but user2 and user3 need to use all free traffic when user1 and user2 haven't full traffic flow.
Which is the best way and how i can do this. Some examples are welcome ( like captured winbox or terminal capture ).