I have referenced an old external Cisco article on how to block Bit torrent traffic referenced on-line Here
This procedure I have found only works 50% of the time.
I find blocking bit torrent specific ports, and doing the regex do work, it just does not catch all the traffic.
object-group service bit-torrent-services tcp-udp port-object eq 6969 port-object range 6881 6999
regex bit-torrent-tracker ".*[Ii][Nn][Ff][Oo]_[Hh][Aa][Ss][Hh]=.*"
Does anyone have more up to date regex for finding bit torrent traffic? Or does is this the limits of the ASA at this time?