Add option to place create node on referenceable node's edit page?

Well, what I need is to be able to restrict users from creating nodes (via nodereference_url create link) that reference nodes they do not have permission to edit.

Node type A is referenceable and is editable only by its author. Node type B is the referencing nodes created via nodereference_url widget's create link. I want the authors of A nodes to be able to create new B nodes that reference their own nodes, but not be able to create B nodes that reference A nodes created by other authors.

In other words, the create link for node type B would not show in the type A links area unless the user is able to edit that specific node.

Any ideas of how to accomplish this?

Thanks

I think I found a work-around.

I set up a view listing A nodes that is filtered by current user. Then I used the view to populate the select list of referenceable nodes on the node add/edit screen for node type B.

Then I just removed the create link from the links area of A nodes.

And added a link, in the submission instructions of node type A, to the node/add page to create new B nodes.

This way users must have node A edit permissions to see the link to create B nodes. Plus the list of referenceable nodes on the B node are filtered by the current user's list of authored A nodes. They can't select other users' nodes.

Thanks for your help and for your great module. I have used it a number of times to create simple image galleries.