(I am using the time.ly events plugin which creates events as custom posts).
Currently using WP Masonry Layout plugin i am able to create a layout using the time.ly events, but i would like to only show the events that match a particular category (as is currently possible for normal posts).
How can specify a category in the shortcode for these event posts?
Categories for custom post is not possible yet. Different plugin create different post types and they assign different kind of taxonomies (similar like category). So this is tough one to included them all. However, we have done this with wooCommerce.
However, we are trying this to add in future release. But not so soon.