Not sure how useful that would be. The point of the plugin is to display lots of posts from all (or many) multisite sites.
If you include/exclude by ID, then how would that work across multisites? Each site might have a post with the same ID number, and remember that it lists posts from all sites. So I don’t think that would be very useful.
You do have the option of displaying by category name (not category ID, because category ID’s for a category names “daily” would be different on other sites). So that might work for you.
If you want to display a particular ID(s) from a particular site, then a template would be best for that. Take the page template, for example, copy/rename it, then change the query to add an array of ID numbers. Then create a blank page that uses that template.
But, since the plugin works with multiple sites (although it can be used on single sites), specifying an ID number wouldn’t be very useful, IMHO.
I am open to convincing, though. How would you use it on a multisite?
