使用Node.JS创建一个无法访问上述任何文件的子进程？

I'm trying to develop a Node.JS Application that allows for users to create their own Node Apps which run as child processes to the main Node.JS app. The issue that I am having is that I do not know how to only give the corresponding child process permission to access and execute files inside it's own folder, eg. I don't want a child process to be able to see the files of another user.I'm trying to develop a Node.JS Application tha