User Access Control

[eluser]jrad[/eluser]
Has anyone tried using role-based access control with codeigniter? Or a successful implementation of a role-based access control on a codeigniter project?

Something like the following:

UserID Role Access Rights

User1 -> Administrator -> create, read, update, delete

User2 -> Billing Clerk -> create, read, update

User3 -> Guest -> read

Wherein access of a user depends only on the role and access rights granted.