Hi @ogoehre, welcome to the Box Community!
To restrict access to specific data in Box based on region, you can utilize Box Zones to control where data is stored and geo-restrictions to limit access based on user location.
You can assign the people in your organization to any Zone your company has purchased. When you assign people to a Zone, their existing files migrate over, and any new files and folders they create within their own root folder are mapped to the assigned Zone. If they create a file within someone else's root folder, that file is mapped to the storage policy of the owner of the file.
To discuss and to learn more about Box Zones, including pricing, you can reach out to our Sales Team through any of the following channels:
Related topic about Box Zones:
Resources and related support articles:
Feel free to reach out to us if you have any other inquiries. 
Does this zone concept also apply to Admin (resp. Co-Admin) rights and priviledges? The question is not about the own files but analyzing user data and behaviour (reporrting), Metadata Creation, Workflow templates as related to a region.