Is your feature request related to a problem? Please describe.
Trying to make a buffwatch WA that lets me know if I need to recast my buff, and open-world cross-faction content involves other players who can't be buffed by me.

Describe the solution you'd like
Add a toggle to the Affected Unit Filters and Info to "Ignore Hostile"

Describe alternatives you've considered
Ask players on the other faction to provide the missing buff. Cry. Don't do cross-faction content. Ignore the Weakaura I made saying half the group doesn't have the buff.

With regards to other potential changes, I considered asking for this to be default behaviour, but I can see a case where a group leader might want to know that the buff is missing so they can actually go "hey, we need this, please cast it."

Additional context
See this thread: #4136
But notably my comment here: #4136 (comment)