OP: I do not believe SE have that service, to split 1 acct into 2

Multi-box: If you try to log on 2 char from the same data center, you will get an error message that you are already logged in on the 2nd char you trying to log in.

HOWEVER, if it is on a different data center, not sure if it's a loophole or not, you can log on just fine. I transferred from Mandragora to Balmung, but I made a new char to chat with friends still on Mandragora. Playing main on PC and alt on laptop.