Users can edit only own comments in details page of their images.
details.php
Find:
elseif ($is_image_owner) {
$admin_links .= ($config['user_edit_comments'] != 1) ? "" : "<a href=\"".$site_sess->url(ROOT_PATH."member.php?action=editcomment&".URL_COMMENT_ID."=".$comment_row[$i]['comment_id'])."\">".$lang['edit']."</a> ";
$admin_links .= ($config['user_delete_comments'] != 1) ? "" : "<a href=\"".$site_sess->url(ROOT_PATH."member.php?action=removecomment&".URL_COMMENT_ID."=".$comment_row[$i]['comment_id'])."\">".$lang['delete']."</a>";
}
Replace string
elseif ($is_image_owner) {
to
elseif ($is_image_owner && $user_info['user_id'] == $comment_user_id) {