function my_coupon_logic( $auto_apply, $coupon_id, $user_id ) {

    if ( wpf_has_tag( 'One', $user_id ) && wpf_has_tag( 'Two', $user_id ) ) {
        $auto_apply = true;
    } else {
        $auto_apply = false;
    }

    return $auto_apply;

}

add_filter( 'wpf_auto_apply_coupon_for_user', 'my_coupon_logic', 10, 3 );