This file contains a list of the IP ranges used by Polish ISP's.
You can use either the .p2p or the .txt, they both contain the same info.
Nothing inherently personal Poland, but in my experience the majority of torrent users from Poland do not seed when they download and most seem to use "leech friendly" clients like BitComet or BitLord.
I enable this list while I am seeding so that I can distribute a torrent as effectively as possible.
Users, do with it as you see fit.
...I am sure this will lead to flaming, but oh, well.