is there a way to lock or secure imovie and its files

Hello and as always thanks for all the help in my previous posts.

I frequently review and edit video that needs to remain secure during the editing process.

Before I import it and when I'm done with a project I can secure it in several ways, but while working on it in imovie its wide open to anyone who opens the app. My mac is under my control, but life goes on around my work and my Mac is used for other things as well.

Is there a way to either lock imovie so it can't be opened without a password and is there a way to hide/secure the folders the program uses?

thanks in advance.

Marc