Search by Usergroup

Hi,

this was possible with legacy versions years ago already. No I use the ultimate version 4.8.3 and I wonder why this is not working already like a standard on this version... 

I remember it was not a lot of coding neccessary for enabling to search by usergroups in the legacy product.... 
Maybe someone has that codelines and I can just include it in my source code... I mean it worked already years ago.....  :see_no_evil::see_no_evil::see_no_evil::see_no_evil::see_no_evil::see_no_evil::see_no_evil:

thanks