There have been plenty of examples where users post on meta to highlight the good deeds of other users, and such posts are usually well-received by the community.
It's also the case that Suggesting or requesting that people nominate themselves in a moderator election is frowned upon.
However, is posting about a user who has already nominated themselves acceptable? This would be a way to campaign for the candidate we want to see elected as moderator. Or would it be unfair to the other candidates who might have equally proven themselves, but without a user posting about them?