Are you planning to keep your personal LJ or move it to Dreamwidth or elsewhere? Or some combination?
I mostly lurk here, but I'll comment anyway. I've already made my move to Dreamwidth and am in the process of shutting down my LiveJournal (although I plan to keep reading and commenting here until the last of my friends and communities is gone).

Of the above options for the community, would you prefer ONE/TWO/THREE/FOUR/some variation?
I'm glad that all of your options include backing up the community, and would be fine with any of them. Considering the Russian stance that even mentioning that LGBTQ folks exist is against the law, I think you're being prudent. I think one and four would be easiest to maintain, and possibly less confusing than having one foot in each place.

If the comm continues on LJ and you move your personal journal to Dreamwidth OR if the comm moves to Dreamwidth and you keep your personal journal on LJ, would you still be active in the community? Or more active, less active?
I mostly lurk, as I'm pretty busy with work, so my presence probably won't change either way.

Other thoughts and/or things you would like to be considered?
Appreciate the fact that the mods are polling members. *cheers you*