Question to anyone who can give a 100% accurate answer

[Neuneck]

Here, dual clienting is one person playing two characters at the same time. It's a bannable offense, so you'd better read this before trying!
It has nothing to do with the numbers of computers.
3 persons in a computing center with 1000 computers would be allowed to play....

3

characters. I charater per real person at any given time (this is also, why we have the @autotrade command).