First, I want to apologize for your question sitting in the community for so long without a response.
Second, it looks like you have stumped the Canvas Community. Were you able to find an answer to your question? I am going to go ahead and mark this question as answered because there hasn't been any more activity in a while so I assume that you have the information that you need. If you still have a question about this or if you have information that you would like to share with the community, by all means, please do come back and leave a comment.
Francisco, to Robbie's reply I wanted to add that at our institution, we configured Canvas Catalog to allow a field we defined as part of the registration process using these steps:
Please note that feature isn't part of the Canvas platform itself, but rather in a related platform, Canvas Catalog.
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