schizowebphrenic
Someone who suffers from WMPD (Web Multiple Personality Disorder) and has different personalities portrayed depending where on the web they're interacting with others. First appearance of the word was on Stalking Venus.
Someone who is schizowebphrenic would portray themselves one way (maybe their real personality) on their blog, while on a virtual reality platform, like Second Life, they may portray a completely different person (or even gender).