This goes in ck-karma.php:

function get_cmt_karma($id)
{
	global $ckarma;
	$karma = $ckarma->getKarma($id);
	return $karma;
}

In the comments.php file add this below the loop:

$karma = get_cmt_karma(get_comment_id());
if ($karma < -9)
{

//The rest of the code in the loop will be here, and then you'll need to add a final } at the end.  You can change the number from -9 to whatever you want.

}