In Ziber Team you can create groups. When creating the group you can set the visibility for the parents in Kwieb.
When the group is visible, all parents can see the name of the group and the participants of the group.
When a group is set to hidden, it will not be visible to parents in Kwieb, unless the parent's child is in this group. When the parent's child is in the group, only the group name for this parent will be visible, not the participants of the group.