Lets understand the use case correctly - you / your customer has created processes e.g "MyProcess".
May be you want to create geography / nation specific variants of this base process, or your customers in turn are changing these processes and now you wants to import them into the same DB. I am assuming you have more than one such variations.
Steps1. Create a variant(s) of the original process (MyProcess) that customer is sharing with outside world. This will create a model "(MyProcessModel(1)")
2. Rename the variant to a more meaningful name "(MyProcessModelForX")
3. Now provide the outside world with an export of the variant MyProcessModelForX.