Filter data in nested json

Filter by working fine if- there is a single item 0n corresponding users
filterBy: ['users.strict']: 'john'

But filterBy not working in following json if users have multiple items
$scope.data = [
{ id: 1, users: [{ first_name: 'Rob', last_name: 'John', mobile: 4444 },{ first_name: 'Robin', last_name: 'Johny', mobile: 44447 },{ first_name: 'Robot', last_name: 'Johno', mobile: 44044 }] },
{ id: 2, users: [{ first_name: 'Johni', last_name: 'Wayno', mobile: 3333 },{ first_name: 'John', last_name: 'Wayne', mobile: 3333 }] },
{ id: 3, users: [{ first_name: 'Rob1', last_name: 'Johansson1', mobile: 2222 },{ first_name: 'Rob2', last_name: 'Johansson2', mobile: 29222 } },
{ id: 4, users: { first_name: 'Mike', last_name: 'Terry', mobile: 1111 } }
];