public function search() {
    // get filter conditions from Form's POST
    $conditions = array(
        'User.field_user_job' => 'Painter',
        'User.field_user_age <' => 30
    );
    $users = $this->paginate('User', $conditions);

    // `field_user_job` and `field_user_age` are CCK Fields

    $this->set(compact('users'));
}