@jikolji -
I am not 100% sure on the following method because I have never tested it out. If you can add them into your class - or have an account created at your institution for them that you can then add that dummy account person into your class. Then add them in as a TA and restrict their viewing to a section that you create with the 5 students they need to look at. I know there is the option when you add a person to a course that they can be restricted to interacting with students in their section only - I just don't know what that actually means view wise.
You can easily try it out by first creating the section with the 5 students. Then add one of your colleagues to the course as a ta with restriction to that section only. Then your colleague can log in and see what is available.
Here are some useful links from the instructors guide:
How do I add a section to a course
how do I edit sections for enrollment in a course
How do I add users to a course
Edit : I just tried this out in my lab course that has 4 sections. I added one of my dummy students in as a TA with restriction to a single section. I could only see the students in that section. So What I state above will work. What @Chris_Hofer mentions is a possibility as well.