AWS SDK for .NET Documentation
OwnerId Property
AmazonAmazon.EC2.UtilNetworkInterfaceOwnerId Did this page help you?   Yes   No    Tell us about it...
The ID of the owner of the network interface.
Declaration Syntax
C#
public string OwnerId { get; }
Remarks
In multiple-interface environments, an interface can be attached by a third party, such as Elastic Load Balancing. Traffic on an interface is always billed to the interface owner.

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)