You want to know if it's possible to have the same file in both the Default workspace and another workspace.
You cannot have the same file name in different worksapces. For example, if you have a folder in your Default workspace named "Test" and then you try to create another folder called "test" in different workspace, this will not work.
The same thing will happen if you try to clone a program to a different workspace and you use the exact same file name. When you are creating new folders or cloning programs, you must use a unique name.