I need some major help!

I need to write or get a script that does the following:
Has people on a network logon w/ their name (and grade) and then it will send who logs on - when - and their grade and when they log off. i need it to send this to a main computer - to a database or a text file (either one)

(also if it is possible i need to be able to close programs on any networked computer and limit the amount of prints each person can do per logon)
also i need it so that they can't do anything until they logon.

Any help with be greatly appriciated!!!

Mills

p.s. if u know of a script like this - plz tell me!