Hi, sorry for the long delay of my response 
have been to vacation.
Your suggested approach did the trick for me. I have added a Pre-Requests-Script to each folder (about 20) and wrote the required info to a temp var.
In my tests I have then used it to write the folder name into the test results like this:
var folderID = pm.environment.get('folderID');
pm.test(folderID, function () {
});
Thank you for your input 
However a native feature still would be great