Código:
$authAdapter = new Zend_Auth_Adapter_DbTable();
$authAdapter
->setTableName('credential')
->setIdentityColumn('email')
->setCredentialColumn('password')
->setIdentityColumn('direccion');
$authAdapter
->setIdentity($form->getValue('email'))
->setCredential($form->getValue('password'))
->setIdentity('San marcos');
$auth = Zend_Auth::getInstance();
$result = $auth->authenticate($authAdapter);


