I can confirm that an author is only allowed to win the maximum # of prizes per author as per each event. Submitting entries via multiple accounts no matter what the circumstances are (your own accounts or an account of a company you work for) in an attempt to win MORE than the maximum # of prizes allowed for an author is not permitted.
Good question though, thanks for posing it!
Thanks for reply Scott,
We have same opinion about this Just asking a question for certainty and curiously. Because in MWE rules we dont found any conditions about it