Limiting number of connected clients

Thanks.

 

I don't really want to limit the number of connection, rather than the numer of unique visitors. (IP's)

 

We run a very popular site, where ppl login and brows 'round. If i limit the number of connection, an already logged in user might lose a connection during something, and a user not logged in might get a connection.

 

 

Was really hoping the above piece of code would work, since it's exactly what i want to accomplish =)