Redirect files / Permalink to file

Hi everyone ??
Great plugin so far! I have a special request, maybe easy to accomplish:
WordPress is running as Multisite (Directory Type). I’m trying to use the redirect plugin on the “Permalink to a file” (every File, e.g. PDF, gets a Permalink in WordPress). Should work like this: URL to PDF on one Site is called and should be (automatically, depending on the country) forwarded to a file on an other Site.
Permalink: https://mydomain.com/permalinkToFile would point to https://mydomain.com/wp-content/uploads/xyz.pdf in Country 1, and point to https://mydomain.com/country2/wp-content/uploads/xyzCountry2.pdf in Country 2
is that managable? Or would I need aworkaround? Test showed that it doesn’t work out of the box for that special case.
Thanks for any hints in advance!