For example if someone made 2 msn hotmail accounts with 2 different ip's for each of the accounts that was made, could those 2 accounts be tracked back to the PC that made them both?
There's an IP address associated with each network card and normally you'll only have one IP address for your machine. However the IP assigned by your ISP may change daily.
When you connect to a server, the server always knows your IP address. If your IP address is dynamically assigned, the ISP could check the DHCP server log to know the user of that address at any moment in time.
So, even if you create two hotmail accounts at different times with the same ISP, it's possible to identify you as the origin of these accounts.
Can you explain a little more about why you're asking about this?
Unless you're an AOL user apparently, since that tends to create problems for me at times, where thousands of people will have the same IP # as me and it always says I'm in Virginia when I'm nowhere near there.
Does anyone have any advice on how I can be more "unique" than those other AOL users that will have the same IP as me at the same time? I mean short of cancelling AOL and going with another service. Unique in the sense where I'm not confused for anyone else.