Restrice subroles as per Users/Groups

Hello Experts,

We have one role (say for e.g. Main Role) in portal which has 4 subroles under it. The 4 subroles are assigned as Delta link to the 'Main Role'.

Now when I assign this 'Main Role' to user, the user has assess to all the 4 subroles. This is a problem.

The requirement is to assign the Main Role to a user and that user only needs to see 2 subroles out of the 4.

Is there any way through which we can restrict access to the sub roles as per the Users/Group?

Thansks in Advavance,

Sanjay Sarode