If you wish to create multiple submissions using different emails, they will be treated as separate submissions altogether.
As long as none of the emails have been previously used to create any other Bonfire vendor accounts, you can create as many vendor accounts as you require (they're free!).
Sometimes buyers may setup their bid to accept alternate bids, from the same vendor email. For example, 1 Primary submission + alternate(s).
To learn more about Alternate Options see this article here: