Hey @bittersweet68,
In the free/premium version if you want to integrate using the “WooCommerce Checkout”, you can offer them a list choice by using the code at https://github.com/ibericode/mc4wp-snippets/blob/master/integrations/woocommerce/list-choice.php.
To send users to the different list based on products they buy, you will need to modify the code.
I would recommend using the same list and instead, use interest groups. Also, the best option is to sync the order data using our premium version. Everything will be in the same list, but then you can set automated emails to send different emails based on which product a user has purchased.