Hey @raoof , this is completely possible. So with WooCommerce you would probably create the attribute Product Writer. Then you can assign that to the author from the product page. No need to programmatically create that. To display it though you will want to hook into the catalog of product page and add it. All attributes are prefixed with pa_. You could use the get_attribute() method or with wc_get_product_terms using the global $product.
You could potentially modify the front end to show the author the sales. Sounds like a fun time.
