Adding sorting options to “Moderate Comments” view

I was wondering if it would be possible to add additional sorting to the “moderate comments” admin view instead of only have sorting by comment_date, comment_post_id and comment_author.

To be more specific i want the moderator to be able to sort the comments by comment_meta_value and comment_meta_key as i have added 3 ekstra fields which are saved in commentmeta table.