2 ppl using single accountFollow

I was wondering, I already have a playonline account, and 3 characters created, so I am taking turns with my brothers playing. I am getting a new computer soon, and planning to get another copy of FFXI. Is it possible for 2 people to log on to one play online account at the same time on 2 different computers, but will be using two different characters to play? ^^

Hehe, seems a lil' confusing @@. But i hope someone can help me with this question before i go out and buy another copy of FFXI ^^

ack, so no way to play ffxi at the same time as ppl in ur family without opening a whole other play online account? @@ cause gettin' charged 2X the fee is pretty expensive...