PiHole 5: Client Group Management ipv6

Quick question (hopefully).

My clients have both ipv4 and ipv6 addresses. When I setup the client to group relationship in Client Management, do I need to create an entry for the client on both their ipv4 address and ipv6 address?

I ask, because when I look, it appears some of my clients change ipv6 addresses (and pihole on the Network page will list many ipv6 addresses per client).

Yes you do. Or you try this maybe unstable branch allowing you to make client assignments based on MAC.