SSH2 question?

[VeeJay]

Hello

I have two questions, please comment...

1. Can one user have more than one public_keys i.e. multiple public_keys?

If yes to above, would all be stored at users path like /home/username/.ssh

If yes, to above, would all public keys be written at the same line
for option in ssh_config file "AuthorizedKeysFile"?

AuthorizedKeysFile      .ssh/user_authorized_keys

2. What about other users who also have SSH account, How to indentify in
ssh_config file that which public_key belongs to which user?

-- 
Thanks!

BR / vj