Passing context to a block field of a display suite node
The way to do it:


Enable Views content pane (views_content, part of ctools I think)
Create a Views display using content pane instead of block display type.
Configure a contextual filter, but don't give it a default value.
Configure the content pane "argument settings" to take a node id from url.
In Display Suite, create a "Dynamic field". Move it into one of the layout regions.
Click the cog-wheel icon in the dynamic field, choose content to display, you find your newly created Views display under "Views panes".


Good luck!