How to use Views with Fields Collection and filter on where used I am using Entity Registrations to handle registrations for a sponsored walk. I have setup a fields collection so that registrants can register more than one person at a time.

At the moment there is only one Registration Entity for the 2013 sponsored walk, but in future there will be more. 

So.... In views I want to create a table that allows the admin to view the fields collection related to a specific Entity Registration. i.e. Show only those users registered for the Spring 2013 sponsored  walk or just those registered for the Summer 2013 Walk.

I could duplicate my fields collection to make a new one for each Entity Registration, but I would rather avoid that type of duplication if I can help it.

Any ideas?
I hope you are creating a view of the type Registration in that case you can add a contextual filter of the type Registration: Host entity ID

Now when you add the nid of the main node you would see the registration specific to that node. 

Note : To get the Registration: Host entity ID as a contextual filter you need to enable the Registration Views module.