Claims rule conditional statements

Hello,

I was wondering if anyone could help me write a claims rule.  I need a claims rule in a relying party trust to do the following:

If the incoming claim userID does not specify a domain such as CONTOSO\<logonid> or <logonid>@CONTOSO.COM, then preface the <logonid> with the default domain CONTOSO\<logonid>.

I'm using ADFS 3.0 on Windows 2012 and I can't use the onload.js modification, which would work fine otherwise.

Thanks

Troy