Custom filtering

[sh-sharifjonov]

public class GetOrdersGridifyMapper : GridifyMapper<Order>
{
    public GetOrdersGridifyMapper()
    {
        AddMap("IsActive", o => o.OrderStatus, isActive =>
        {
            var activeStatuses = new[] { OrderStatusEnum.Created, OrderStatusEnum.Confirmed };
            var inactiveStatuses = new[] { OrderStatusEnum.Completed, OrderStatusEnum.Canceled };

            return isActive == "true"
                ? activeStatuses
                : inactiveStatuses;
        });
    }
}

How can I add custom filtering like this? I have several defined statuses and through a specific parameter I control these statuses. Is it possible to do this?