I can. I'd just have to change how this is structured in the db. Currently, it's like

user {
   id
   name 
   ....
   pubkey
}

and I'd have to make it

user {
   id
   name 
   ....
}

pubkey {
   pubkey
   userId
}

and also rework the linking UI. Shouldn't take more than a couple hours to do though once started ... just that migrating the db needs to be done carefully.