Deluge
It will be great, if it were able to apply some ip filters for different torrents.
example:
My ISP has its own local area network and internal resources with much greater speed, and they used a ipfilter blocking all but ip addresses if ISP local network (10 .*.*.*).
At the same time, if I Downloading torrents from the Internet, this filter only block process.
If you could apply ipfilter for torrents to downloaded only from selected tracker and the rest do not touch, it would be very good.
I am sure that this situation for many users (at least in Russia it is very common)
Sorry for my English, but my native language Russian