Only only hide a specific Category?

I am working on my local machine, want to achieve the following
1. I want even the visitor’s to see my entire Store except for a specific category(s) which is meant for my wholeselers or Registered Users?
2. I want the ‘wholeselers [a User Role, any registered User], to be able to see the entire store, [obviously] including that restricted ‘Category(s)’.

I tried BUT couldn’t figure it our myself, I will really appreciate if someone can help me with this?
Thanks in Advance!