Hmm i give it a try...
so you have 5 Accounts with the same characters.
You open 5 WoW.exe on you pc or maybe on a other pc so you need to do that per network(keyclone i mean)
so open one window and the others are in the background.
so if you confifurated all right you could press "W" and all your characters run forward
but how i nearly works i don't know
BTW sry for my bad english