How do I set up 2 separate accounts with one id in Game Center?

[iMore Question]

Want to set up an account for my and a separate account for me in Game Center, we share the same iTunes id

 

[HankAZ]

Want to set up an account for my and a separate account for me in Game Center, we share the same iTunes id

AFAIK, it's not possible... only one account per ID.