Yes, and tried to get in touch but the author is currently not responsive. It is complementary and it would make sense to provide real world feedback collected by fedeproxy users (even if they are just a handful 
) to help develop the vocabulary and data model.
I did not look into the history of the forgefed project enough to figure out if they were inspired by https://en.wikipedia.org/wiki/DOAP and the ontologies doap-* found at https://ontologi.es/ (doap-bugs + doap-changesets + doap-tests + doap-deps) that you mentioned.