How many logins?

So can I have multiple log ins on this site wth this name or do I have to use a different screen name?? Or Different computer??

You should only ever have one profile on this account and there are ways of finding who has multipul accounts on here. You really only need one if you want to ask a discrete question mark it as fau after you have put it on.

Nope.
That would be really pointless. Just use the same login. You can use your user name from any computer.