artesea

Whereas the built in moderation just looks for keywords wherever they appear in the comments, Better Moderation allows you to define if it should just be the username, url, email, comment, ip, useragent or all of them. 
It also allows you to define if when looking for “word” whether you should match “WordPress”. 
Finally it lets you set reasons why words have been added to the list, allowing you to quickly realise why a comment has been added to the moderation queue.

Better Moderation

Provides more control over comment moderation

.fay

WP Comments Moderators plugin allows any user (whatever their Role) to moderate any blog comment.
WordPress only allows users with Administrator|Editor role to moderate comments. Those two roles give much more than our need, if you are scared about your blog and dreamed about a lightweight solution, this plugin can be helpful for you.

WP Comments Moderators

WP Comments Moderators plugin allows any user (whatever their Role) to moderate any blog comment.

Better Moderation vs WP Comments Moderators