No hostility. Just honest questions. Many post what they can't back up. :-)Just because they work the same on the UI level doesn't mean they work the same way on the coding level. There are several ways to create any program.
Your network was used to illegally download content. That is a fact. They don't make that mistake. The IP address is that of your Router. Either you or someone on your network did it. My Netgear N600 router tells me what all devices have been using my network. I suggest you change your wifi password, if you didn't do it. Or replace the router, if it is an older one.