Even if each connection has the same remote IP address + TCP port, it has a distinct local port. What you get back from opening /net/tcp/clone is essentially a

Even if each connection has the same remote IP address + TCP port, it has a distinct local port. What you get back from opening /net/tcp/clone is essentially a directory name, with the local port as a file name in it, along with a few more files representing various attributes of interest.