Track An IP Address could be connected with an ISP. The advice here can be used to identify the ISP – and maybe some other big organizations in charge of the IP address in question. Subsequently the content owner makes a claim for advice and contacts the company. There is some archaic US laws involved for US businesses – worldwide, it is a wreck that depends on politeness….

But an IPv4 address is not adequate anymore. Windows Internet Connection Sharing stays cryptic – but unneeded for most people that get a WiFi router suited to their ISP connection and let everyone in the family on an individual apparatus  and share it with their relatives and buddies also,

However, a timestamp and that is all that is almost accessible the logs of whatever service was used to deliver the content the content owner lost control of of who used that IP address when and the internet service providers logs.

There are lots scenarios where tens of thousands of individuals will use the same (set) of IPv4 addresses.

But ISPs (and most companies) that are not content owners do not care as much about this problem as content owners do and if there is no legal, commercial, or political motive for co-operation I doubt it occur a lot.