User can have multiple GatherContent accounts linked to the same email address. This lets you work across projects that may be in different GatherContent accounts you may have setup or been invited to.
You can create a new account using an email address you've used previously. All you need to do is log out and reregister. During the registration you will need to select a unique subdomain.
Heres how you can view and access your multiple accounts:
1. Login to GatherContent
If you're already logged in you can go straight to the choose account menu.
2. Choose the account you want to work in
You'll see a full list of your accounts. You'll be able to select the one you need to access.