Add a "switch account" function.

Hello, my forum is phpBB2.
thesnowpack.forumotion.com

It is an RPG forum, and each account is set as one character for easier use and information. I wanted to make an option where the user can switch their account easily to one of their other characters. Or perhaps link accounts so that when they post they can choose which account to post as (sort of choosing which character to post as).

If this is possible, that is.

Thank you in advance.

edit --
Also wondering if it's possible to allow members to make multiple accounts using the same email address.

Alright, thanks for the information -- I'll just have to figure out some other way to do things around the forum, then (;