You mean change the email address just for the forums rather then the whole station account?
If so then no, since the forums are integrated more into the station system then the lithium forums before them.
If you just mean change the email address associated with the station account then press the my account link at the top of the page, select the edit registartion tab after loging in and then the edit registration button. From there you can change your email address.
If you mean some otherway then can you clarify it?