View inside display suite block field - contextual filter using display suite's block field, which i chose a view block.. so when i have view page ('parent' view) it list many nodes. each node has a field for block view ('child' view).

how do i get child view to filter its results by the node id it is being displayed with in parent view?  like a contextual filter, but not getting nid from url, but the node the block field is part of.

i like using display suite layouts, but need to rewrite the author field link. so i figure id make view to show the author and rewrite, then insert it into the node view mode as field. but i cant filter the child field how id like.
You should use Display Suite Dynamic Field instead of Block Field.

It allows you to select a view and pass the appropriate contextual filter arguments.

From Dynamic Field documentation:


  A dynamic field can be used in combination with the Views Content Pane
  submodule of Ctools to pass contextual arguments to a view. Steps:
  
  
  Install Ctools, Views, and Display Suite.
  Enable the Views Content Panes module and Views UI.
  Create a new view. Add a contextual filter--for example, node NID. Add a content pane display. Configure the "arguments" argument of the
  display to enable the exposed filter you added. For example, select
  "From context" as the source of the argument and "Content ID" as the
  context.
  Create a dynamic field.
  Under manage display for a given content type, configure the dynamic field to use the views content pane you configured.