How to work with dynamic ips from ippool and static ips for clients?

Is there a way to do this in the same datatabase? I would like to work with ippool, but some users need static ip. How to proceed in this case? Thank you -- Diorges Rocha Gerente de TI Tel.: (67) 3451-4035 Cel.: (67) 9938-1105 R. Edson Bezerra, 685 - Centro Itaporã - MS - Brasil CEP 79890-000