Can an IMAP email account be configured so new items don't show in Mac OS Mail Inbox?

Hi,

I would like for my assistant to be able to access my IMAP mail account and vice versa. It will be useful to see complete correspondence history for clients and jobs.

However, I only want to see his email when I choose to, or when I run a search. I do not want all his new mail to show in my inbox, and neither does he need all my new mail to show in his inbox.

Is there a way I can add an IMAP account so that it's available as an account, but where new mail doesn't show in the inbox?

Thanks!