If my account is on Blahaj and the community I moderate is on another instance like lemmy.world, and the user is from an instance we defederate from like hexbear, I won’t see the hexbear user’s comments (or even their user if I search for it) from my Blahaj instance, and so I don’t see a way I can moderate their comments on the lemmy.world instance I moderate.
Does this seem right? Is there any workaround?
(I guess I could make an account on the same instance as the community I moderate just for moderating that instance?)
mod actions generally do federate correctly, at least on the latest lemmy versions. it’s just reports that don’t.
but in general, you will need an account on the community instance to get full federation abilities when you take potential instance bans and defederations into account. even when it’s not a defederation, if a user is banned from your instance but not from the community instance their posts won’t make it to you.
You can ban directly using Tesseract and if mod actions federate there it’ll ban them, and it’ll also remove their comments if you tick remove submissions. I’ve done it before for users banned from Blahaj but commenting in our communities.