filtering by mac address?

[scole_mail <scole_mail%gmx.com@localhost>]

Is there a way to do this in NetBSD?

I know it is not secure.  I just wanted to block some spammy devices and
maybe block dhcp requests from particular devices on one of my machines.

Searching around the web, I see it can be done with linux/iptables,
freebsd/ipfw, and openbsd PF/bridge, and hoped it could be done some way
with NetBSD...

Thanks for any suggestions