How to set up Identity on MVC5

If you're using AD/LDAP (Windows Authentication), you can use the IPrincipal.IsInRole("role") method to determine group membership and use your groups for RBC.

If you're using a username/password model, you'll need to build your own role provider. There's a tutorial at http://www.codeproject.com/Articles/607392/Custom-Role-Providers which may target MVC3, but will still work fine for 5.