I know but it's the shadow effect that i seek.
Also in the manual this code is not longer valid:
Sidebar Display
In a default installation, user group styling does not apply to the Members Online Nowblock in the sidebar.
To enable styling to show in this location, the sidebar_online_users template must be edited.
Look for this line of code in the template:
class="username{xen:if '!{$user.visible}', ' invisible'}{xen:if {$user.followed}, ' followed'}">{$user.username},
Replace it with this:
class="username{xen:if '!{$user.visible}', ' invisible'}{xen:if {$user.followed}, ' followed'}">{xen:helper richUserName, $user},
Styling is then present in both of the blocks.
Whithout the komma at the end it works. Otherwise you have two komma's after each name.