I think it's likely he's Batman...
Now hear me out! He calls the sub-forum, the "Batcave" and doesn't reveal much about himself (because ifhe did we would know his TRUE identity). He also names his software with a "Beast" type name. This was of course related to his experiences with KGBeast from the OLD DC Comics. He has also revealed his name ISN'T, Tony. Which leads me to believe he named himself after Tony Zurro, one of Batman's less popular antagonists to further hide his identity
I think i've debunked this mystery