Portfolio responsive logo ?

Short answer: No.

Long Answer:  Adobe Portfolio doesn't have options for using different images on different devices (aka the SRCSET attribute).  Instead one image scales to fit smaller viewports. 

https://sawdust.myportfolio.com/

Feel free to submit a feature request directly to the Portfolio team.  If enough other users agree that it's needed and it's a viable request, they may add an option for it to a future release of Portfolio.

This link has information on Portfolio
-https://community.adobe.com/t5/download-install/is-portfolio-still-being-developed/td-p/11583268?page=1

Portfolio is not supported on this site. You want this site: http://help.myportfolio.com/

However, since someone might know an answer for you, I'll pop this over to the Creative Cloud Services forum. 

The Using the Community forum is for help in using the Adobe Support Community forums, not for help with specific programs. Product questions should be posted in the associated product community.