If you want the rule to fire on ALL interfaces, just leave off the in-interface option entirely. If it’s not specified then the in-interface won’t matter. If you want to match ALL BUT ONE interface use a negation: in-interface=!ether1 means “matches if the in-interface is not ether1”. If you want to exclude two or more interfaces you need to list each interface explicitly in one rule each, there is no wildcard matching.
As far as I know the bridge filter is only applied to interfaces that are listed in “/interface bridge port”. If that lists interfaces that you don’t to filter on you will have to enumerate interfaces in one rule each, as there are no wildcards.