ApplicationModule.cs

            builder.Register<SenderFactory>(c =>
            {
                var context = c.Resolve<IComponentContext>();

                return (client) =>
                {
                    var sender = context.Resolve<IEnumerable<ISender>>()
                        .Select(s => new
                        {
                            Metadata = (ClientMetadataAttribute) Attribute.GetCustomAttribute(s.GetType(),
                                typeof(ClientMetadataAttribute)),
                            Value = s,
                        })
                        .First(s => s.Metadata.Client == client)
                        .Value;

                    return sender;
                };
            });