Yes, admin can set commission on categories, products and even create different rules to charge commission from the vendor/seller of WordPressnWooCommerce Multi Vendor Marketplace. Admin just needs to install plugin named “Marketplace Advanced Commission for WordPress WooCommerce“. This plugin gives the ability to admin to set commission for products, categories, and specific seller categories. Admin can also use various commission rules to charge commission from the seller. In case if any product lies under various categories on which admin has set the commission, then the highest commission will be applicable on the product.