To adjust motion sensitivity for different zones

I have several elite cameras where you can add multiple detection zones. I would like to be able to change the sensitivity for different zones on each camera. For example I have a camera on my driveway. Although the motion zone is not covering the road at night the lights of a passing car causes shadows that then trigger an alert. I would like to be able for example select a zone near the road to be people only. And the other zones as more sensitive.