Hi I can understand your use case as it would be handy.
I was trying to redirect/ block devices that use random MAC addresses conforming to RFC7042 by the IEFT.
There is other use cased for wildcard mac addresses listed in standards.
wild card on 48bit mac identifiers to a single word match could mean a list with 2⁴⁴ of a total list of 2⁴⁸ entries in reality.
ipset for example needs to match only from current hosts attached to the interface creating a file full of mac addresses is unrealistic.
I have tried to put in a request at the netfilter site for ipset but registrations are blocked and I have had no reply to registration.