Welcome to Android Central forums. We're going to need more information to even begin to offer advice I'm afraid.
Let's start with the basics, what device is this?
What app is does this work on, work with, or use?
What is the purpose of the camera?
When you say that, users are able to navigate through the device, what do you mean? Just look at random things, specifically the camera settings, look at other people remotely?
Anyway, as far as random suggestions I cannot think of anything that would allow the app to be open but prevent use of or changing settings. A parental app could block settings changes but probably not in an open app. I was trying to imagine something like Tasker being used, but I don't believe it has the level of control. With this being an official corporate device rooting might be out of the question, if there is even an exploit for it, cause it probably isn't the most expensive device being corporate. Even so I can't think of anyone who would write an exploit to block settings, usually it is the other way around where they want more control, more access. I think you might hit a dead end on this one.