As much as i dislike Legend.. he and Nadia are not the same person
As for Freedom fighter/ Solomon kane.. hes walking a very fine line between dual clienting and not.. but as far as i have observed(and ive done a lot of that trust me) he will always just minimize one client and play with the other. It would be a very very rare occurance to cath him having forgotten to exit war mode for example with the archer and hit you while already on the mage and casting spelss on you. And while one of the char is being idle.. that is not considered duel clienting.
Loop on the other hand sometimes keeps hidden archers infront of spawns that auto attack you when you run by while they spawn on other account.. now thats illegal
you may cry about it!