You can monopolize a search result, but it would require doing the following to avoid penalties and cancellation of accounts.
1) Open separate Adwords accounts, preferably with unqique emails as we do here. For us, it is simply creating a unqie forwarder for each client that redirects to one common address.
2) Ensure each account is opened with separate credit cards, preferably with different mailing addresses as well.
3) Unique web addresses, or domains. You can not advertise more than once for any one domain.
4) Unique Landing Pages, or pages that are different enough that the Google AdWords bot won’t judge the pages as being the same and therefore stop showing the late arrival to the advertising game.
Its not recommended but hey... if you wanted to do it this is how!