I'm not too familiar with Canadian law, but they do things pretty similar to the US and jurisdictions on intellectual property theft/piracy tend to overlap or be shared, so my advice is probably relevant to you.
In the mid-1990's, Internet Explorer 4 phoned home to Microsoft and tattled on people who had illegal copies of Windows 95 without telling them that it was doing so. Microsoft sued a small engineering firm for a few million dollars. They counter-sued because of IE phoning home without their consent and won. That early striking blow has made stopping and catching internet pirates very difficult for the BSA, RIAA, and MPAA ever since.
When you join a torrent swarm, your IP address is broadcast to every other member of the swarm. There is no way around that. They have to have it for bittorrent to work. There are internet "tattle-tales" who find torrents of illegal content, join the swarm, and harvest the IP address of every member.
Those addresses are useless to them. Without a federal warrant, they can not tie the IP address to a specific person, physical address, or anything that would identify the user. Privacy laws and the above precedent prevent it. Getting said warrant is an expensive and slow process. They have tried going through it a few times to make examples out of users, hoping to scare everyone else out of pirating content, but it backfired and became a PR nightmare the first time they pressed charges and sued a single mom with three kids for downloading one stupid CD.
They ARE, however, able to find out what ISP owns the IP address (Shaw, in your case). So what they do is draft a mean letter addressed to "John Doe" (you) stating exactly what you were caught downloading and when, then send it to you in care of your ISP. Your ISP is expected to forward it to you (THEY obviously know who the IP address belongs to). Since an ISP can technically be held responsible for your actions on their network (although it has never happened) some get really draconian and pull the plug on your service, if only temporarily. Others just send the letter on to you and forget about it. I have no idea what Shaw's policy is, but mine (Suddenlink) will cut off your service until you visit a special redirect web page with their terms of service on it, check a box and click a button promising to never do it again, and then they restore your service. Get three letters within 12 months, and they cut your service off for six months. Jerks.
The way around this is to use a VPN. Pipe your traffic through a server that is P2P friendly and your IP in the swarm will be that of the server, not the IP owned by your ISP, so nasty letters will go to an overseas data center who doesn't give a flip. I don't know if there are any free VPN services or how reliable/fast they are. There are paid ones that are very cheap, very fast, and have essentially zero downtime. They are also handy for security purposes like doing your banking or surfing at a coffee shop where your wi-fi might get sniffed. Astrill (http://www.astrill.com) is one of the best names in the game, with dozens of servers around the world to choose from.