I know this is an older question, but for anyone looking for something like this.
I’ve done a bit of testing, trying different things using exported fields and load field filters. As it stands now this is not possible in ACF. In order for conditional logic to work the fields must be in the same field group. Something like this would probably require a complete rewrite of the conditional logic JavaScript code.
I’ll mark this thread for review by the developer, but I can’t say this is something he’d want to add. The conditional logic is already quite complex.
