support for nested localField

From: Astro <andhareatish@xxxxxxxxx>
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Mon, 25 Apr 2016 00:38:52 -0700 (PDT)
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Can we use $lookup with nested value for *localField?*

I have following $lookup stag:

{$lookup:{ from:"users", localField:"appinfo[0].user_ids[0]", foreignField: 
"_id", as:"userinfo"}}])

where appinfo is a nested array: 

appinfo=[ { name:'xyz', active: true, user_ids=['user1', 'user2', 'user3'] 
} ]

Any help will be appreciated.

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