File/Folder Permissions For Application

I need some help if anyone knows how to accomplish this:

I am creating a Microsoft Access Database system which needs to be granted file/folder permissions to a specified directory which the current user logged in would not have access to. Basically, I have a secured folder on my network drive, which I want the Access system to be able to save files to. I do not want the users to have access to the folder, only the Access system. Is there a way to grant this type of permission to the Access Database? I could create a user on the network for the Access Database with the correct permissions, but how do I go about making the access system use different credentials than the user logged into the machine?

Any help would be greatly appreciated.