Matching on more than node titles

Hi-

I'd like to use the user matching module to try and connect users through an existing taxonomy field. I added a missing hook_perm to get the user matching module working, but can only find an admin screen that just allows me to set the comparison operator for a title field.

Is there something else (besides the Content Matching API, node-profile plugin, and user matching) that I need to enable for the taxonomy term matching/CCK field matching to work? What else might I be missing?

Thanks.