If they are using different ports then that's ok IMHO. However, they will drain your system resources. Another hidden effect is any pinging done upon each one via anti-file-sharing companies. That constant pinging effect may cause you to lose internet connection when running 3 p2p apps at once. The 3 apps are all java apps and all based on LW code, well at least originally. Java is not super memory efficient and often has memory leaks. Meaning a lot of memory & VM is used some of which should have been released at some point. LW has long been known to have memory leaks, sometimes less than other times. An example of a memory leak is where memory is stored temporarily into virtual memory on the disk, and despite a request to have that portion of the memory cleared because it has become irrelevant/redundant, the information is not cleared after all and instead builds on top of what was there. LPE suffers greatly with memory leaks unfortunately.