Post Author Moderation

Is it possible to allow post authors to moderate comments of the posts they wrote?

I tried modifying:
if (current_user_can('moderate_comments')
to
if ($post->post_author == $current_user->ID)
but this seemed to give ANY author moderation ability over Any post. I’d really like to limit the ability of post authors to moderate posts that they wrote.

Any help would be greatly appreciated. Thanks!