Hello, I am kcmartz, and I own kcmartz.com (http://www.kcmartz.com). It is EzPortal powered, and I have the multiple forum mod installed, each with the same ezblocks viewable on the seperate forum.

NAME: Home Page | Kcmartz's Site
URL: http://www.kcmartz.com

• http://geek-talk.kcmartz.com
• http://sfd.kcmartz.com

Owner: Kcmartz
Description: This is the official website of kcmartz.com. I have multiple forums, one a general discussion forum, the rest catering to specific subjects. If you sign up on one of them, you are signed up on all of them! I hope you enjoy your time at kcmartz.com, the place to go to chat about tons of topics!

I don't think it can be done unless you signed in under the same usename and if that username has not be deleted, banned, etc.  If you registered a new account, then the answer is 'it can't be done.'