So following that logic, can it be shot without LOS of target and guided by third party, like operator with LM? If yes, then it's helluva step forward and gives a lot of options in combined operations, be it defence or attack.
Yes... it has SALH optional guidance or semi active laser homing... or laser spot homing where someone else can use a laser target marker to mark the target.
I should be clear however Russian and Soviet systems are different from US and western systems... they basically have two forms of weapons... direct fire and indirect fire laser guided... in both cases you can't just lob a weapon in a general direction and then use the laser to ensure a hit.
You need communication between the launcher and the target marker and the process is synchronised by computer so the coordinates of the launcher and the target are worked out and the aim is calculated, and then using a calculation based on flight time the round is fired/released and the computer in the target marker starts a count down. For a direct fire weapon 1 second from impact the laser turns on and marks the target and the missile or projectile fires side thruster rockets to adjust its trajectory to hit the target spot. For indirect weapons like laser guided bombs or artillery shells the time is 3 seconds to manouver which means the weapons are already aimed at the targets anyway... the laser guidance systems just improve accuracy to ensure a kill on moving point targets.
The laser target marker could be a Ka-52, or Mig-35 or a UAV, or a soldier on the ground or a tank or armoured vehicle... most modern Russian armoured vehicles would have the capacity to aim their own laser guided rounds and therefore should have the equipment to mark targets too.
The Sokol-1 however actually uses an optical guidance that has video processing that can detect moving objects and identify them for targeting.
It can see laser spots as well so if it detects a laser spot that is coded correctly it will home in on that, but could also detect a tank in the open especially if it is moving.
Sokol-1 is a direct fire weapon however and likely can't be used in the indirect role like most of the Russian and Soviet cannon calibres.