Allow 'ROLES' for subcategories

I have setup my BackOffice so that I can sell items at a discount to our Wholesale customers, compared to regular price for Retail customers.

When setting up Categories there is a Role for "admin" so only an admin can see that category , but there is no such option for SubCategories.

This creates a problem for reporting. I have no way to see my total bread sales combined for retail and wholesale, as rather than having "retail bread" and "wholesale bread" under the "bread" category, I am forced to have "bread" and "wholesale bread" categories

Please add a Roles field for SubCategories!