Connection specific dns servers configuration

[Moineau54]

I'd like to have a connection specific dns server config that doesnt get overwritten by the global dns setting. for example I run a pihole on my network and would like my laptop to use it while I'm at home and then when I leave, it would revert back to the global one. as it stands right now, the dns server configured for a connection gets overwritten by the one in the global config