Q: Has any one done customer Contract MOD , please post the code .You might want to describe what functionality you envision this sort of thing to have.Q: Another Help , how to control the  login user based on the contract end

date and where to include this function(we have the query).You would have to do some custom coding.  I think that if I were to have to do something like this I would add a custom field to the clients (expiration) then I would setup a script to run hourly that checks the expiration, and if it's expired then run a SQL query to update the user in ost_user_account and make their status=3.  (3 means administratively locked).