Index: wp-admin/includes/template.php
===================================================================
--- wp-admin/includes/template.php	(revision 12777)
+++ wp-admin/includes/template.php	(working copy)
@@ -2012,6 +2012,7 @@
 	$post = (int) $post;
 	$count = wp_count_comments();
 	$index = '';
+	$userid = apply_filters( 'get_comment_list_by_user', '' );
 
 	if ( 'moderated' == $status ) {
 		$approved = "c.comment_approved = '0'";
@@ -2055,6 +2056,10 @@
 		$total = '';
 
 	$query = "FROM $wpdb->comments c LEFT JOIN $wpdb->posts p ON c.comment_post_ID = p.ID WHERE p.post_status != 'trash' ";
+
+	if ( !empty( $userid ) )
+		$query .= "AND user_id = '$userid'";
+
 	if ( $s ) {
 		$total = '';
 		$s = $wpdb->escape($s);