How to set authentication for Admin,User and Company.

Question

Hi,

I'm doing project in MVC.

How to set authentication for Admin,User and Companies.

I have done authentication for Admin and User.

For example User sends the resume.First admin view all the resumes.After verified by the admin, all the verified resumes are viewed by a companies.

Companies are the client who are purchase our software.

How can I differentiate companies and user ?