Yes, the runtime-only client should be on the Lookout 5.0 CD that you have. You may have to browse the CD in order to find the folder for the install. This install is typically only used on a seperate machine. You can create a client process on your development machine that will access the server that is running on that machine. You would need a license in order to implement this setup, so if that is not an option for you, this will not work. But ultimately, the runtime-only package would prevent someone from editing the process.
After re-reading your original question, seems that you want to prevent someone from accessing the user manager and changing other users' rights. In this case, you just need to change the levels of security that you
are using. Maybe level 6 to allow someone to close Lookout, level 7 to access the menu bars, and then make yourself the only level 10; so that you are the only one who can edit the process(level 9) or edit the user accounts(level 10). Hope this helps.
Patrick R.