A jury decides standing???
In every case I've read about in several decades of paying attention, the question of standing is one of law, to be decided by a judge, and appealed if someone doesn't like the answer.
Jurors are deciders of fact, not of how the law applies.*
* With the notable exception that if a jury decides the law is draconian, or misapplied, they can refuse to convict and there's an end on't.