This article explores how you can set up order routing rules by including or excluding a set of countries. This will determine routing rules whilst being country specific.
Onport allows the restriction of the vendor to certain countries, by only allowing sales to be routed to the vendor if in a given country.
Here is how to set it up:
Go to Contacts > (Choose Dropship Provider) > Routing tab.
Add Countries to Countries Serviced section.
Save the changes applied.
Here you can include or exclude certain countries: