Hi,
If you mean, that you can't find out to sidechain in Logic, then it's a question about your DAW and not about Vocoder V.
I don't use Logic, but afaik then Vocoder V should work fine in Logic no matter you use Vocoder Vs audio input or not. I assume you can find a Logic tutorial about how to use a vocoder in Logic out there.
EDIT: Here it look like you can find the solution in help in Logic:
https://forum.arturia.com/index.php?topic=105249.0 EDIT END
If you can't find out how to set Vocoder V to accept audio input, the the info is available in the manual. That's just to enable a button.
If you just use sample play in Vocoder V, then it work like any other instrument you use.