Sorry for the delay, the alerts were not correctly setup on the forums and missed your question.
The answer is that this is not currently supported. While you could map a unique user document library by specifying the URL https://company-my.sharepoint.com/... and the user credentials, currently there is no way to specify other credentials.
We are working in a new version using OAuth2 that make this request doable. Can you please add this request to https://dnndrive.uservoice.com/forums/148788-dnn-drive and vote for it?