From Hack Forums Wiki

For an explanation of this category, see Moderator. A Moderator is someone who ensures that policies and rules of Hack Forums are not being broken or bent. While the ability of a moderator is limited in comparison to Staff or Administrators. Moderators generally only moderate a single forum or very few. Group Owners are made moderators of their Sub Forum to enact any action they wish in their own group, while forum moderators for public sections such as the Lounge are free to enact actions that hold up site policy or rules. A forum moderator who moderates something in the public eye are held to a much higher level of understanding of the rules or that it will be used fairly and correctly. A group moderator on the other hand, can do as s/he sees fit, as it is their group to do with.

A current list of Moderators can be found here or at Moderator.