I would add a prefix to the names of your reports ("PersonnelAdminR", for example) then look for that prefix using string functions.
I see you're a beginner so perhaps beyond you skill level at the moment, but certainly doable.

Worked with Access for several years, rusty as it has been a few since I have done anything with it.  Recently been building a new database for my job so I am slowly getting back into how things work.  Also, been a while since I worked with any VBA coding, not an expert but not necessarily a beginner either.  Just looking for some direction as I get myself back into what I know and can remember about this particular database system.  I added a prefix already, just trying to figure out a string function which will work.  So, that is where I am at the moment, like I said just looking for ideas to spark my memory and remove the cob webs of non use over the years, thank you for your assistance.

Thomas
Something to consider would be making a table for your reports and add a category for the report.
Use a Combo Box on your form to filter the list box for which reports to present to the user.  

I know this solution was presented some where but I'll have to do some searching to find it.
I haven't watched this video or the extended cut in awhile but that seems to me to be a more flexible solution if you have lots of reports and need to narrow down the selection.

If that is something that interests you let me know and I'll look deeper assuming someone doesn't beat me to it.

The easiest method would be to do what Kevin suggested and name the reports accordingly. OR you could maintain a table with the report names and what groups they should be in. OR you could utilize the .tag property of the report, but that's a lot more advanced.