Yes. Take a look at our shared links feature (private, secure and can be password protected). Those with the shared link only get access to the individual dashboard that you shared and nothing else.
Great. Thank you. One more question while I have your attention:
Can I still use utm_* codes? Or something similar appended to a link (in the query string) in order to add attributes to a visit? And then analyze / filter by those attributes?
Yes. UTM tags (utm_source, utm_medium and utm_campaign) are fully supported. And you can filter the dashboard by any of them. And you can also see which of them refer traffic that ends up converting on any of your custom events/goals. You can try it out on our live demo: https://plausible.io/plausible.io
https://plausible.io/docs/shared-links
(I'm the co-founder of Plausible)