We can use "New profile posts" Widget.
But I cannot find a conditional statement that will only show posts from either certain users or certain user groups.
It would require some form of custom development to do properly.
You may be be able to edit the widget_new_profile_posts and only show posts from members matching specific user IDs but I don't know how feasible that's going to be in terms of the number of user IDs you need to filter on, and whether the output would function correctly.