@
thenewbie and @
IPv4 are correct there is no way to apply this kind of filter using autodl, and there is no plugin that I am aware of that will stop a torrent based on the peer clients. I am sure you could code a solution, but I don't really see the point in that.
as IPv4 said you should take advantage of
PTP seed bonus system, and also if you long term seed, with
PTP you will get upload over time. I have found seeding some fairly old and obscure movies that if I seed it long enough people will eventually download it. The
PTP membership is the most active membership I have seen on archive content, just takes a bit of patience.