foo.php

<?php
// $Id$

/**
 * Returns access-
 *
 * @param $node
 *   The full node object, which should be proved.
 * @param $terms
 *   The terms the user has access to.
 * @param $vid
 *   The vid which should be used for checking.
 */
function pt_compare_access($node, $terms, $vid) {
  $access = FALSE;
  foreach ($node->taxonomy as $term) {
    if ($term->vid == $vid) {
      $nodeterms[] = $term->name;
    }
  }

  foreach ($nodeterms as $term) {
    $access |= in_array($term, $terms);
  }

  return $access;
}