Get the ip address of the connected user

I want to get the address of the computer of the connected user (not 127.0.0.1 or the address given by InetAddress ) because i want to restrict the access to my website to only some countries Code frequetly found in the internet:

   java.net.InetAddress i = java.net.InetAddress.getLocalHost();
   System.out.println(i);                  // name and IP address
   System.out.println(i.getHostName());    // name
   System.out.println(i.getHostAddress()); // IP address only