List objects where I'm secondary owner

I'll explain what I'm trying to do in more detail. Maybe, there is another way to do this. We have a number of users who will manage other accounts that also belong to them. These accounts are mostly set up for specific use cases and reside in many different OUs. We need the users to be able to only reset passwords on these managed accounts. Because there is no easy way to delegate permissions to each user for the accounts they manage, we thought we would make the user "Secondary Owner" of these managed accounts. What I'd like to be able to do is see all these managed accounts in one place when a user logs into the web portal (I'm using Self Service but I can change it to the Admin or Helpdesk site if necessary). So, the question is: is there a way to list all the accounts for a user who is secondary owner of these accounts?

Hope this clarifies my goal a little better.

Also, if developing a custom page would accomplish this, I would be open to hearing how that could be done. Thanks.

Also, if developing a custom page would accomplish this, I would be open to hearing how that could be done. Thanks.