WordPress only allows Administrators and Editors to moderate comments.
Comment Moderator adds a new user role named Comment Moderator which only has the permissions to manage comments. Simply install this plugin, activate it, and assign any user the Comment Moderator role. That user will now be able to moderate comments (all comments or only their own).
No other permissions of the user will change so rest assured this plugin will not interfere with anything else on your site.Doc last modified on June 29, 2015