This is an accepted solution.
Are you asking if you can connect more than one Amazon account to your Shopify store? Or are you asking if you can open more than one Shopify account?
Yes, you can do it. One of the things companies sometimes do is set up a number of Shopify stores to manage their money in different languages among their customers. (You can do this in different ways in Shopify, but it is unfortunately a lot of searches. Developing a website with [Store Name] costs language and money. You can do it on Myshopify.com). Many Shopify sites can contain different products that require different configurations and custom markets for different audiences.