Multiple IPs for 1 account.

Trying to do something for a client.
He needs a lot of subdomains but a few he really wants on their own IP instead of shared,
I can't seem to find a way to add a domain to a user and give it a separate IP.
Is it possible and I am just missing it?

Thanks,
Dave

Hi, it's bad idea to have many websites on the one account.
Just create a reseller account and create one account for each domain into reseller (if needed).