Edit in JSFiddle

<div ng-app>
    <div ng-controller="customerCtrl">
        <h1>고객목록</h1>
        <ul>
            <li ng-repeat="customer in customerList">
                [{{$index+1}}] 고객이름 : {{customer.name}}, 고객나이 : {{customer.age}}
            </li>
        </ul>
        <h2>18세 미만 고객</h2>
        <ul>
            <li ng-repeat="youngCuster in youngCusterList">
                [{{$index+1}}] ㅗㄱ객이름 : {{youngCuster.name}}, 고객나이 : {{youngCuster.age}}
            </li>
        </ul>
    </div>
</div>

var customerCtrl = function($scope){
    var customerList = [
        {name: '영화', age: 10},
        {name: '순회', age: 28}
    ];
    var youngCusterList = [];
    
    angular.forEach(customerList, function(value, key){
        if(value.age < 18){
            youngCusterList.push(value);
        }
    });
    
    $scope.customerList = customerList;
    $scope.youngCusterList = youngCusterList;
};