[support] Input field based on user field data?

Hi,

On a site I am working on I have a field on the user profile that users complete when registering that can have one or more values entered.. Lets says its a "favourite colours"..

I now want to create a content type that users can create that uses those entries to present a selection to the user (drop down, multi-select, etc.).. So in other words for the "favourite colours" field on the new content creation page they only have the choices of the colours they have saved in their profile in the "favourite colours" field..

Hopefully that makes sense.. :)

Anyone have any idea how to do it?

TIA