Low Order Fee for Group Discount members only

I was wondering if it is at all possible to only enable Low Order Fee for members of a Group Discount

e.g.

// Check if Group Discount member
if (IS_ADMIN_FLAG == false && $_SESSION['cart']->Group Discount member() !no) { 
  $this->enabled = false; 
} else { 
  $this->enabled = true; 
}  
 

Let's say the customer has to be part of customers_group_pricing 3 ...

You can customize the file:
/includes/modules/order_total/ot_loworderfee.php

// only show if customer is a member of customers_group_pricing 3
      global $db;
      $chk_group = $db->Execute("select customers_group_pricing from " . TABLE_CUSTOMERS . " where customers_id = '" . (int)$_SESSION['customer_id'] . "'"); 

      if ($chk_group->fields['customers_group_pricing'] == 3 && MODULE_ORDER_TOTAL_LOWORDERFEE_LOW_ORDER_FEE == 'true') {
        switch (MODULE_ORDER_TOTAL_LOWORDERFEE_DESTINATION) {