I am part of two teams. We have one game on here under my account, and I want to now add another game from my other team on here. Is this possible? I would hope I don't need to manage two separate Itch accounts.

Thanks in advance,

You can add yourself as an admin in the game's control panel (click Edit and go to More->Admins). Once you've done that, the game will appear on your personal creator profile as well. Might have to enable it first from the theme editor.

Edit: but if you want to actually have two separate creator profiles, each with its own games, then yes, I think you need separate accounts right now.