Hi lashanw
As I understand, what you need is to have 2 inventories at the global level and be able to assign the products to them, isn't it?
If so, for each product, you can create its own inventory/ies.
Although, you can't add product A to the inventory of product B.
Inside the product, you can see all the inventories that are related to it and always can add the quantity of the product for each inventory, but, as I marked you cannot add a different product to these inventories.
Even if you give inventories of different products the same name (to identify that they are in the same warehouse, for example), they are completely independent inventories.
Please, tell me if you have any further questions.
Best regards,
Iryna