Is what you are asking have to do with the Nym Mixnet?

Or are you by chance asking about setting up a Lightning address nym for your Lightning node?

If the latter, here's some info on that:

GitHub - fiatjaf/satdress: Federated Lightning addresses server
#22373
https://github.com/fiatjaf/satdress
https://github.com/nbd-wtf/satdress <-- The new Github account for satdress

do you mean use a Nym to open a channel?