Why Camunda Web Based Modeler doesn't have candidateStarterUsers property in property panel?

i want to get all process witch user can start that. in bpmn.io modeler this property doesn’t exists in property panel .

bpmn.io is only a demo of the core libraries.
For the functionality you’re looking for you should consider taking a look at our Web Modeling platform Cawemo

If your question refers to running processes and Web Application you’re talking about is Tasklist/Cockpit.
Then you can define authorized users via the Admin panel.