Hi Dey
I'm sorry but this is not possible with ATUM Multi-Inventory. You can make that a user just could buy from one inventory, but this is with region restriction mode. The possibility to exclude an inventory when the users has already selected one is not available.
In any case, you can always use custom development to add this feature, but as we don't offer this service you will need to hire a developer.
Best Regards,
Andrea.