Absolutely! Just set up CF7 and the NS Connector plugin identically on all sites (and of course you’ll have to authenticate each one separately with Google as part of the Connector settings). Just make sure that the CF7 forms are perfectly identical. I recommend getting it working with 1 first and then copying the exact same form code between sites.
The form itself has to be exactly identical?
I’d like to be able to at least distinguish between which sites the form data is coming from. Do you know what I mean?
Ah. I see. The form FIELDS have to be identical. You could maybe do something with a hidden field that you set to a specific value on each form, and the name of the field / column in the sheet might be something like “domain” – then on each form you’d hard-set the value that it would always contain, which the user would never see. This is just a theory – you’ll have to experiment to see what is possible.