Hey @Traugdoor - That's the beauty of FTW.in. You do not need to do this!
You've got one place for your game networks. When you go to edit your profile and connect your PSN and Xbox Live, you enter THOSE unique email addresses and passwords to authenticate, which are then are connected to your profile. And when you create listings, you choose which system you are playing to make a listing and it shows the correct PSN ID, Xbox gamertag, Steam ID, etc. Thus no need to have separate FTW.in accounts!
This way you have 1 profile for all the games and networks you play on. We will have new ways for you to find other like-minded gamers and that's part of the fun!
However, if you still wish to have separate emails this way, you can. To do that, click Sign Up and enter a unique username and unique email address. We do not allow the same email address to be used on different usernames.
Hope this helps!