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In OAAD, there's an example for the entry moderator:
moderators of online discussion groups
But I've seen the preposition for used in that context by native speakers too. Are they both correct? Or does it have something to do with different dialects?
Searching Google yields the following result:
So, the preposition of is more common. Is that the only difference?
I would say that "Moderator for" is referencing the main or only moderator for a site, while "Moderator of" indicates that this is just one of several moderators at a site.
I used to be a moderator for the site boards.ie
When I was, I was moderator of the Paganism, English, Programming, and Sex & Sexuality forums.
The first statement expresses the relationship that rôle had to the site. The second, the relationship that rôle had to particular forums.
The two could overlap. For a while I had responsibilities relating to the entirety of the site, so it would have been correct both to say I was a moderator for the site, and a moderator of the site.
