WritableValue writable = new WritableValue();
writable.setValue(model);
IObservableList observableSubElementList = EMFProperties.list(ModelPackage.Literals.MODEL__SUBELEMENTS).observeDetail(writable);
ObservableListContentProvider ocp = new ObservableListContentProvider();
tableViewer.setContentProvider(ocp);
table.setInput(observableSubElementList);

//One wrong possibility to observe changes in the SubList:
IObservableList observableSubSubElementList = EMFProperties.value(ModelPackage.Literals.SUBELEMENT__SUBSUBELEMENTS).observeDetail(observableSubElementList);
observableSubSubElementList.addListChangeListener(new IListChangeListener() {
    @Override
    public void handleListChange(ListChangeEvent event) {
          //Do something
    }
});

//Another wrong possibility to observe changes in the SubList:
IObservableList observableSubSubElementMap = EMFProperties.value(ModelPackage.Literals.SUBELEMENT__SUBSUBELEMENTS).observeDetail(ocp.getKnownElements());
observablePermissionList.addMapChangeListener(new IMapChangeListener() {
     @Override
     public void handleListChange(ListChangeEvent event) {
          //Do something
     }
});

private Map<Object, IObservableList> observablePermissionMap = new HashMap<Object,IObservableList>();

method:
..... 
WritableValue writable = new WritableValue();
writable.setValue(model);
IObservableList observableSubElementList = EMFProperties.list(ModelPackage.Literals.MODEL__SUBELEMENTS).observeDetail(writable);
ObservableListContentProvider ocp = new ObservableListContentProvider();
tableViewer.setContentProvider(ocp);
table.setInput(observableSubElementList);

observableSubElementList.addListChangeListener(new IListChangeListener() {
  @Override
  public void handleListChange(ListChangeEvent event) {
    for(final ListDiffEntry entry : event.diff.getDifferences()) {
      if(entry.isAddition()) {
        addObservableToMap((MySubElementClass) entry.getElement());
      } else if(observablePermissionMap.containsKey(entry.getElement())){
        observableList observable = observablePermissionMap.get(entry.getElement());
        observable.dispose();
        observablePermissionMap.remove(entry.getElement());
      }
    }
  }			
});
for(final Object objectToObserve : observableSubElementList) {
  if(!observablePermissionMap.containsKey(objectToObserve)) {
    addObservableToMap((MySubElementClass) objectToObserve);
  }
}
.... 
end method

private void addObservableToMap(final MySubElementClass objectToObserve) {
  IObservableList observable = EMFProperties.list(ModelPackage.Literals.SUBELEMENT__SUBSUBELEMENTS).observe(objectToObserve);
  observable.addChangeListener(new IChangeListener() {
    @Override
    public void handleChange(ChangeEvent event) {
      //Do something, in my case:
      table.getTableViewer().update(objectToObserve, columnProperties);							
    }							
  });
  observablePermissionMap.put(objectToObserve, observable);
}