User and Role management in SSO integration with Jasper 7.2

I am trying to integrate SSO in Jasper-7.2 with my application. There are few things I would like to tell you. 

1. I am using Authentication based on Request as documented here.
2. I want a set of external users of my application to have admin privileges in Jasper UI and another set of users of my application to have non-admin privileges whenever they log in. 
3. I have a way to differentiate between the two sets of users.