Override Domain-Restricted Content in a View
I posted this on the Domain Access issue queue as a support request and got this helpful answer:

You can only accomplish #2 under three conditions:


The content is marked "Send to all affiliates"; or
The view is a page marked as a Special Page Request (which disables Domain Access rules); or
The view is set to ignore node access control -- this is an advanced Views configuration.


Option 3 can create security issues if you are using other node access modules.

To make the content link to the appropriate domain, use Domain Source, which lets you specify a canonical URL for each node. If you don't use Domain Source, the canonical URL is calculated for you.