This question may be a bit strange, if not entirely misguided, but here
goes...
Is there any way to assign inet aliases to a networkB interface such
that each IP addressB uses a unique MAC address?
B 
Here's why I'm wondering:B We have aB network behind NAT, but with a
few internal hosts that require BINAT. ThisB was working fine with some
configuration similar to:
B 
/etc/hostname.vr0
inet 123.123.123.100 255.255.255.248 NONE

inet alias 123.123.123.101 255.255.255.255

inet alias 123.123.123.102 255.255.255.255

inet alias 123.123.123.103 255.255.255.255
B 
/etc/hostname.vr1
inet 192.168.123.254 255.255.255.0 NONE
B 
/etc/pf.conf
Int_Net="192.168.123.0/24"
binat onB vr0 from 192.168.123.11 to any -> 123.123.123.101

binat onB vr0 from 192.168.123.12 to any -> 123.123.123.102

binat onB vr0 from 192.168.123.13 to any -> 123.123.123.103

nat on vr0 from $Int_Net to any -> 123.123.123.100
B 
We're attempting to change over to a new ISP, but apparently they
require a 1-to-1 mapping of MAC addresses to IP addresses. Although
they're providing us multiple static IP addresses, they say they can't
support our old configuration of multiple IP addresses uing the same
MAC address. The first outbound connection we make causes the MAC
address to become "registered" with the IP address used. Subsequent
connections from different IP addresses don't work.
B 
I've neverB run into a set of requirements like this before.B Any ideas
or suggestions would be appreciated.
B 
B