Добавляем в функции
/**
* Replace 'customer' role (WooCommerce use by default) with your own one.
**/
add_filter('woocommerce_new_customer_data', 'wc_assign_custom_role', 10, 1);
function wc_assign_custom_role($args) {
$args['role'] = 'subscriber';
return $args;
}





