I have not managed to reach the netfilter team but wild cards are not supported I did find this past patch that added support for wildcards but it is not included:
https://martin.uy/blog/wildcard-support-for-mac-addresses-in-netfilter-linux-kernel-and-iptables/
By match I mean a match item/ set member (macaddr/ip/cidr) in the firewall ipsets box:
a simple dropdown box would make it easy to make up sets from hosts on the local network.
something like this perhaps to add entries to the match items:
A txt file is not suitable for the list entry as I would have 2⁴⁴ entries in the txt file to match the below wildcards that defines the set of random mac addresses defined in rfc7042 for manufactures to use:
*:*2:*:*:*:* *:*6:*:*:*:* *:*A:*:*:*:* *:*E:*:*:*:*