Do you mean "how can I apply security to script developers"? If so, you can externalise the parts of your script for which different people are responsible into different files and apply proper NTFS rights to those files. For example: everybody can read those scripts, but only specific people can modify them.
But in the end, the account that does the reloading must have (read) access to all script code.
The file in the editor on the right contains a part of a load script that is used by the QlikView document on the left and that should get special access permissions. You can grant access to that file using regular Windows Explorer dialogs. In Windows Explorer, select the script file and open RightMouseButton->Properties->Security.