Hello,
After Authentication I store the userID in a datasnap session and in the
following pages I check if the user is Authenticated (via the examples javascript setcredential function)
but I like to check also if the user can view the page by checking the param of the page and
the Session userID.

Sneaky I asked this question again in this thread:
  https://forums.embarcadero.com/thread.jspa?threadID=53812&tstart=0
  Mathew DeLong suggested to look at this page:
  http://code.marcocantu.com/p/delphirelax/
  But I looked if I could solve my problem ONLY using the Session created