I have many labs that do not require any type of authentication, so anybody from
a street can come and print a much as they want to. iPrint client is the answer
to provide authentication just for printing. But the problem with iPrint client is that :

1. remembers previous users credentials and if user does not reboot system next
user will print on using this account. There is a need for clear window to pop-up and ask user to provide user name and passwords every time they attempt to print.
2. Users have to type full context - all my users are in one container, so I could specify the context. Therefore they would only enter user name and password.

Is there a way to accomplish that?