Not OP, but I believe for most companies including IBM the policy was "anyone residing within Russia who did not wish to or could not relocate outside of Russia" would be terminated. If you did relocate (and I believe some assistance was provided) then you were fine.

I work for an IBM subsidary, and to the best of my knowledge this is how it worked. One of my coworkers is a Russian expat (and I believe still citizen) living in Europe and they were unaffected.