Ranked passwords per user

I have a family plan and almost all passwords are shared. On some sites, my wife and I both have credentials. What I need to do is rank/sort the credentials that are being provided. If I'm logged in, I'd like the default to be my credential. If she's logged in, I'd like the default to be hers. There doesn't seem to be way to do this without making one of them private.

It seems to be more of an issue on iOS than other platforms.