If you are looking for a ISP that allow torrent trackers on server, then visit
2x4.ru
They are not the cheapest butthey are very competent, very good support ,you can let them setup dedi server with soft/hardware what you need and i would say they are very secure.
You can try to negotiate over the price with them.
Support over ticket system and messeging systems like ICQ, Skype.
Payable over Paypal , Bank transfer and some others.