How to Register and resolve objects using rules in Microsoft Unity

Question

Hi, I have a scenario where I have multiple classes implementing one interface. When at runtime the resolution is done I want some rules to execute to give me back the required instance.

I am thinking of writing some extension for Unity which can accept the configurations like this:

<unity xmlns="http://schemas.microsoft.com/practices/2010/unity"&gt;

    <!--Interfaces-->
    <alias alias="IAddress" type="Interfaces.IAddress, Interfaces" />
    <alias alias="IUnityRule" type="Interfaces.IUnityRule, Interfaces"/>

    <!-- Implementations-->
    <alias alias="PersonalAddress" type="Implementation.PersonalAddress, Implementation" />
    <alias alias="CorrespondenceAddress" type="Implementation.CorrespondenceAddress, Implementation" />
    <alias alias="AddressRule" type="Implementation.AddressRule, Implementation" />

    <container>
      <register type="IUnityRule" mapTo="AddressRule" name="addressRule1">
        <constructor>
          <param name="postcode" value="AA11AA"/>
        </constructor>
      </register>
      <register type="IUnityRule" mapTo="AddressRule" name="addressRule2">
        <constructor>
          <param name="postcode" value="XX11XX"/>
        </constructor>
      </register>
      <register type="IAddress" mapTo="PersonalAddress" name="padd">
        <rule evaluate="AddressRule">
          <dependency name="addressRule1"/>
        </rule>
      </register>
      <register type="IAddress" mapTo="CorrespondenceAddress" name="cadd">
        <rule evaluate="AddressRule">
          <dependency name="addressRule1"/>
        </rule>
      </register>
    </container>    
  </unity>  

IUnityRule is

public interface IUnityRule
{
    bool Evaluate()
}

I am sure that somebody else already must have faced such situation or found the solution! solutions/suggestions are greatly appreciated