Negative. If an owner is flying on his NJA account during an NJA strike, the crew operating the aircraft would be flying struck work in my opinion. If an owner has multiple accounts at different companies and uses his Flexjet / Shares/ Flops account, that flight would not be struck work as NJA is not receiving any revenue from the flight.
So, how do you determine who ultimately receives the revenue? You strike. What visibility do you have over who is flying on what charter company and who ultimately receives the revenue? How will you know if the hours are charged against said owners nja account? Charter companies ain't gonna tell you who's flying on their planes. Nja ain't gonna tell you how an owner paid for it. All you have visibility over is nja aircraft.