yes
i've attached 7.6's top posters, which has an option to choose which groups ( default all groups are included ) to include in the list.
so, for your example, you probably want to NOT have groups 1, 2, 3 ( admin, globalmod, mod ) included, but all else.
Assuming you have just users for now ( group 4 )...
you would do $inGroups = array( 4 );