Is there a way to create a loopback adapter for the mac?

In the MS world, there is a MS Loopback adapter, that allows to create a virtual network card and simulates that there is a LAN cable connected to it.

I would like to see if there is a way to do that in the mac world.

I found this link and I believe is a hint, but I'm not sure if is going to work, I don't want to try it and damage my network settings.

Thanks in advance for your help.
Greg