The closest thing I can think of is an email client's "send as". Apart from that I've seen some phone apps and browser extensions that focus on helping you manage multiple accounts on a given service, like Reddit or Twitter.
Thank you very much for your input. Looks like a lot of people have this kind of needs. Usually I have to create multiple email accounts to have multiple roles of me. I'll do some research on SnapChat, but why do it like it? That's for kids.
