samba_dnsupdate and multiple interfaces

[brendan powers]

Does anyone know why samba_dnsupdate adds DNS records for all
interfaces except loopback? This is causing problems in my setup
because it adds records for subnets that are not available from my
network(VPN and VMWare interfaces).

This would be very useful if bind new what IPs to hand out to what
clients. However, it just picks from the list in a round robin
fashion(I think), and clients on my network get addresses outside
their range.

Am I doing something wrong, or is this the way the samba_dnsupdate
script is supposed to work?