General developer forum

Hi,
I created three roles(Role-A , Role-B, Role-C) and three category(Category-A, category-B,Category-C) Can i make the category-A to view only users who are assigned role-A and category-B to view only users who are assigned role-B.And role-C should see the category-C align with the category-A and Category-B. If this is possible in moodle what is the procedure to do it.
Please help me with this issue.