No, you can use the same account and do not need to register again if you've already previously registered with Bonfire on one organization's portal.

The only time you'll have to register again is if you're trying to access the portal for an organization in a different geographical area (e.g., Canada, the US, or Europe). You'll know you need to register again if you go to the Forgot your password? screen, enter in your existing email, and receive the following message: