What you are describing is geofencing, and yes, Storj is working with customers on a case by case basis to accommodate their needs for geofencing, when ever possible to guarantee data resilience, as a minimum number of storage nodes would have to exist in the desired geofenced region in order to be able to successfully store and maintain availability of their data in the long term, according to our SLAs.
We are in the early stages of developing and implementing geofencing capabilities, please stay tuned.