$criteria->addAlias("acc", AccountPeer::TABLE_NAME);

$criteria->addMultipleJoin(array(
  array(CustomerPeer::ID, AccountPeer::alias("acc", AccountPeer::CUSTOMER_ID)),
  array(AccountPeer::alias("acc", AccountPeer::BILLING_SYSTEM_ID), BillingSystemPeer::PORTAL_65),
  array(AccountPeer::alias("acc", AccountPeer::IS_ACTIVE), 1)),
Criteria::LEFT_JOIN);
$criteria->add(AccountPeer::alias("acc", AccountPeer::ID), null, Criteria::ISNULL);
$criteria->setDistinct(1);