It's part of configuring whatever services you're running (or an option in your tcp/ip library if you're programming your own), and will depend on the service. For memcached for example, you can change the listen address with `-l <addr>`. Usually you just have to find the configuration documentation and ctrl-f search for "address," "bind address," "listen address," "IP address," etc. Or scan the page for something networking related.

It's pretty much always a command line flag or config file parameter.

If you're running with docker, it's even more standard. When you expose a port, just use `-p 127.12.12.3:11211:11211` (with your chosen IP address, of course), and docker will set up the forwarding for you, only for that address.