Sure. Wherever you live, organize around pushing for your own country (and/or those it has influence with) to back down. War between nation-states is universally war against the working class everywhere.

If you live in Russia, organize around getting Russia to back away and stop expanding the front (though yeah: good luck with that at this point...).

If you live in the U.S. or any Western country, organize around going hands-off and halting the shipment of weapons and halting expansion of NATO.

If you live in Ukraine, organize around pushing for diplomacy, an end to conscription, and all the state repression that's been aimed at anyone speaking up against the war, against NATO membership, against fascists' role in governance and policing and war-making, etc.

Either way, push for a diplomatic end to the meat grinding. Ceasefire, ceasefire, ceasefire. Under any conditions whatsoever, really. Doesn't matter where the fucking national borders finally wind up on a map. Ceasefire. Doesn't matter who last did whatever strike or terrorist act or whatever. Ceasefire. Doesn't matter who said what racist nonsense about whose mother. Ceasefire.

All other problems can and will be solved by us, outside of the "solutions" of (especially neoliberal) nation-states. We will deal with the fascists. We will deal with systemic racism and state-oppression of various ethnicities, etc. We will deal with reaction against the left, labor, and the working class. No war but class war.

In any Western country, of course, this will be interpreted as "pro-Russia". LOL. It's bullshit, of course, but that's the shit leftists have always had to deal with. Especially when fighting on the anti-war, anti-imperialism front.