XF 2.2 Multiple Users under same IP


Sorry if this has been asked elsewhere but I am having trouble because it seems that multiple users have same ips at times even if it is not the same person or even someone in that same area. Is it possible to have multiple users from different locations have the same IP in the xenforo backend? I just want to make sure before cleaning up multiple accounts that appear to be one person just incase. Several people have claimed to only have one account but they could be lying. I have no way of knowing and wondering if this is a glitch. Thanks