Best way to to this is to add a table in your datamodel which is connected to your loop field (field you use to create seperate qvw's.
You than have a group of people how need access. If this field is for example their e-mail address which is known in Active Directory, you can let Publisher set the NTFS security.
You will need to set a few things. See my screenshot. Your settings maybe different depending on how you would like to have publisher lookup the list of users.
Hope this helps you.