still not certain. I know that the Ka50 can laze a target for the Kh-25 missile and that a buddy can take over the laze of that same missile if you're launching from far away or if you'd like to just pop, fire, and run.
The manual talks about the laser designator working for the Kh-25, Kh-29L and lazer-guided bombs, so there is hope.
I don't know if it works between the Su25 and the Ka50 though. No clear answer exists, so I'm edging towards "probably not" but I'll keep looking. The 25 is a pig, not nice to use on the Ka50, especially since it's loaded outboard. Firing one at a time causes serious unbalance.
However from the frog it should allow some nice sneaky kills while allowing the frog to run and hide from the defenses while the Ka50 operates in "stealth mode"
(really really slow, hehe)
enemy radar will struggle to pick up a slow target moving close to the ground.