A lumiverse is the naming scheme for Resolumes internal DMX screen system. 1 Lumiverse can actually be routed to multiple universes. They each have the same channel min/max but a Lumiverse only resides within the Resolume advanced output.
A universe is how a lumiverse is routed outside of Resolume. Every other artnet system refers to a universe,(nodes, light boards, fixtures.) i assume the resolume guys named this so you can talk about your advanced outputs settings with colleges without getting mixed up.
You could have
Lumiverse 1 go to universe 1/2
Lumiverse 2 go to universe 3/4
So if your co worker said yo, change lumiverse 2 that means you need to makes changes which effect universe 3/4. Its a clever way of showing they are connected without adding confusion when talking to your techs.
Also if you go an LD and keep saying i'm outputting 5 Lumiverses he is going to assume you just talk funny.