This question already has an answer here:
This is basically a reverse of https://stackoverflow.com/help/merging-accounts.
Let's say a user has a single account on several SE sites that are linked (for example, Stack Overflow, Programmers, Gaming and RPG).
They want to expose their SO and Programmers professional accounts to a professional audience, but don't want anyone to link that to their more "frivolous" Gaming/RPG accounts.
Is it possible - as a one-time event - split that one SE account into two separate accounts? The assumption is that they would be 100% independent of each other, with different logins, and no further association between them? If so, what would be the procedure?