Adding ethereum address proof - can we have a meta data field?

[javaspeak]

When adding ethereum addresses to an an avatar, we can add those addresses for different purposes.

For example an ethereum address could be added which is the address an Unlock Certification was given to.

So if I am using an avatar and want to display the Certifications associated with it I would need to take all the ethereum addresses in the avatar and call external APIs to see if there is an unlock certification associated with it.

However if it was possible to have some meta data associated with the added address, then one could know which addresses to use to query the Unlock API with.