Capture IP address of user submitting form

Please help - What do you mean “if you display it in a field then it captures the users ip”. I have been trying to get this to work using ipiphy and indeed I keep ending up with the server’s IP, not the user’s. What is the trick here? I’ve read through this forum post as well and it seems they’re trying to solve a much more complicated problem.

I just want one of the fields in my one of my “thing”'s to be populated with the user’s IP address (upon page load or whatever logic is relevant in the workflow).

Thank you!