Defining conditional routes

I've been searching for something similar but no luck. I want to build an app that uses different controllers for same urls. Basic idea is like that if a user is logged in as admin he uses lets say admin controller, if user is just a user he uses user controller. This is just an example, basically I want to have a function that decides what controller route takes.

Thank u everyone. Any help is greatly appreciated.

PS Use of this: Admin has different UI and options, Output catching, Separation of concern