The current version supports dynamic properties. Please have a look at the sample "PropertyGrid/Editors/More EditorDefinitions" from the "Live Explorer app" available here : https://wpftoolkit.codeplex.com/releases/view/99072.
This sample uses an EditorComboBoxDefinition to display a ComboBox of colors with an ItemsSource that could be a binding.
This sample uses an EditorComboBoxDefinition to display a ComboBox of colors with an ItemsSource that could be a binding.