Possible new bot program out.

[Zaft]

Nope. Once you can control the other character, without having to physically switch to and manually control that other character, it is no longer multi-boxing, it is botting.

Not true. Most multi-boxers use a program that replicates their controls across multiple clients. This is why you almost always see multi-boxers as the same class (such as the infamous 5 ele shaman, or the 8 BLM we see on FFXIV). As you can assume, this falls into a somewhat grey territory as to whether or not it's allowed, but groups like Blizzard do allow it, because the player is still having to actively give the commands to the characters.