In a nutshell, no.
You can have multiple numbers (identities) for yourself on the different device and the numbers you are using on those devices can be different sets of numbers (they don't have to be the same ones). But at this time we don't have anything that has logic based on the contacts who call you as to which phone you want them to ring on.
This thread was the product of our fantastic collaborators during DIGITS Beta! As many terms have changed and bugs have been exterminated since the Beta launched, the information here may no longer be accurate. If you still have a question, please search our active threads or ask a new question in the DIGITS space!