Relationship between more than two properties

Hi,

it is possible to create relationships between more than two properties? I have 3 drop down lists. The second list depends on the first list and the third list depends on list one AND two.

For a releationship between two properties i can use this: http://www.virtualizationteam.com/management-automation/vcac-6-property-dictionary-relationship.html

Does anyone know the code for three properties?

Thanks

Nico