Previously, I was using custom assignments to do the following:

  rule-defaults:
  if:
    has-true: <group.default>
  give:
    - skyblock/group.skyblock
    - lobby/group.lobby
    - vmr/group.vmr
    - kitpvp/group.kitpvp

This would allow me to weight those groups higher than default, and add a display name to each group. However this takes away from storage optimizations as it saves every single default user.

I've since moved to removing the custom assignment and using the following default group instead:

/lp group default parent add vmr server=vmr
/lp group default parent add skyblock server=skyblock
/lp group default parent add main server=main
/lp group default parent add lobby server=lobby
/lp group default parent add kitpvp server=kitpvp

This allows default users who come and go to not take a toll on our DB size, however we have no way to assign display name per server for these defaults.

Say I want defaults on Skyblock to be called Pilots
And I want defaults on Lobby to be called Travelers.

This is not possible as there is no way to:
/lp group skyblock setdisplayname Pilot server=skyblock

I can only:
/lp group skyblock setdisplayname Pilot

However with the above, users on the Lobby are called Pilots, when I would prefer them to be called Travelers.

Basically, we would like to know if there is a way, or if you can please allow a way to set displayname with a server-context.

Our goal is for this to work:

/lp group default parent add vmr server=vmr
/lp group default parent add skyblock server=skyblock
/lp group default parent add main server=main
/lp group default parent add lobby server=lobby
/lp group default parent add kitpvp server=kitpvp
/lp group default permission set displayname.Runner true server=vmr
/lp group default permission set displayname.Pilot true server=skyblock
/lp group default permission set displayname.Builder true server=main
/lp group default permission set displayname.Traveler true server=lobby
/lp group default permission set displayname.Fighter true server=kitpvp

Any help would be really appreciated.

Thanks so much @lucko tested and works perfectly! <3