He has to be posting under another username.
He would need to change his whole persona. I don't see him being able to do that.
With some people, they can't hide who they really are. Their natural selves come through. Take Greenbriar for example. She thought she could be some obscure DUmmy by changing her screen name. That lasted for about three posts.
DUmmies don't have the ability to change who they are.