Launching Win app from Client - how to ensure only once

Please is it possible to ensure that operator can launch only one Windows app from Client Viewer - some object with system.util.execute([SomeWindowsApp])?

I don’t believe it is possible to restrict it to only launching one instance. I don’t think there is an easy way of determining if the application that was launched is still open or not.

Is this still something that is not possible? I would like to prevent my operators from opening more than one window.