Sounds like you're just needing a grid userlist as shown below on our demo site.

demo.cbdemosites.com/community-builder/user-lists/grid-layout

You can enable grid usage under the Parameters > Display tab while editing your userlist within CB > List Management. You can place whatever information you want in it as it just displays the fields added to your userlists columns. As for the specific group I assume you mean specific usergroup in which case you'd just select your usergroup in the "Usergroups" parameter of your userlist under the Global tab.