It depends on what you mean by Game Discussion. If you are talking about outside the game in your group's forums then as Aaron mentioned, each post is tied to your account so the best you could do is make it in third person such as Jose says in an exasperated tone while rolling his eyes " I said it does not work that way " . If it is inside the game in the chat then you can do emotes (/em, /as or /emas if you are the GM) or change the speaking "as" selection that is located below the chat input box.