change admin view to user view based on the form variable sent to application cfc file in coldfusion

I have these files:

Application.cfc:
     Onrequeststart method:
          session.remoteuser = cgi.REMOTE_USER

Based on the this user, the view is: Admin view or user view

I have index.cfm

 <div ng-app controller>
    </div>

Angular code replaces the view here.

But from admin view i want to create a form which changes the session.remoteuser to any user they want to view as. I created a form in adminview.cfm page and checking to see if the form is submitted in application.cfc. But I see application.cfc is fired twice so the view is getting the user id, but goes back to admin id. How do I achieve this ?