How would I check for an aura applied by other player in the party?

[austere condor]

I'm looking to check for the Lunar Storm aura applied by an MM/Survival hunter in the same party (Haven't done load conditions yet for testing).
Using Destination Unit set to Player allows the WA to show up for me but ideally I want to link this WA to my party's tank so they don't move mobs out of lunar storm. I tried setting it to Source unit, asked someone randomly and they couldn't see it supposedly.

Also would be super neat to set a world marker on the primary target hit with Lunar Storm so the tank knows where the lunar storm roughly is but I'm not sure if that's possible with WAs.

[austere condor]

Used Source Unit and name-server worked for me. Would prefer is this worked with all MM/SV Hunters but it's a start.

Now I'm still curious if I can set world markers on targets with WAs. If not, I guess I can mark enemies with a blue square or something though that's not ideal due to M+ auto-markers/raid leading.

[distant halo]

You can't make things show up for other players unless they install the aura. You can track other players auras with a normal aura trigger. If you want specifically only other players auras you can specify Not Own only.

you're not able to place world markers with weakauras.