/usr/include/Swiften/Network/ is in libswiften-dev 2.0~beta1+dev47-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Swiften/Network/BOSHConnection.h
/usr/include/Swiften/Network/BOSHConnectionPool.h
/usr/include/Swiften/Network/BoostConnection.h
/usr/include/Swiften/Network/BoostConnectionFactory.h
/usr/include/Swiften/Network/BoostConnectionServer.h
/usr/include/Swiften/Network/BoostConnectionServerFactory.h
/usr/include/Swiften/Network/BoostIOServiceThread.h
/usr/include/Swiften/Network/BoostNetworkFactories.h
/usr/include/Swiften/Network/BoostTimer.h
/usr/include/Swiften/Network/BoostTimerFactory.h
/usr/include/Swiften/Network/CachingNameOnlyDomainNameResolver.h
/usr/include/Swiften/Network/ChainedConnector.h
/usr/include/Swiften/Network/Connection.h
/usr/include/Swiften/Network/ConnectionFactory.h
/usr/include/Swiften/Network/ConnectionServer.h
/usr/include/Swiften/Network/ConnectionServerFactory.h
/usr/include/Swiften/Network/Connector.h
/usr/include/Swiften/Network/DomainNameAddressQuery.h
/usr/include/Swiften/Network/DomainNameResolveError.h
/usr/include/Swiften/Network/DomainNameResolver.h
/usr/include/Swiften/Network/DomainNameServiceQuery.h
/usr/include/Swiften/Network/DummyConnection.h
/usr/include/Swiften/Network/DummyConnectionFactory.h
/usr/include/Swiften/Network/DummyTimerFactory.h
/usr/include/Swiften/Network/EnvironmentProxyProvider.h
/usr/include/Swiften/Network/FakeConnection.h
/usr/include/Swiften/Network/GConfProxyProvider.h
/usr/include/Swiften/Network/HTTPConnectProxiedConnection.h
/usr/include/Swiften/Network/HTTPConnectProxiedConnectionFactory.h
/usr/include/Swiften/Network/HostAddress.h
/usr/include/Swiften/Network/HostAddressPort.h
/usr/include/Swiften/Network/MacOSXProxyProvider.h
/usr/include/Swiften/Network/MiniUPnPInterface.h
/usr/include/Swiften/Network/NATPMPInterface.h
/usr/include/Swiften/Network/NATPortMapping.h
/usr/include/Swiften/Network/NATTraversalForwardPortRequest.h
/usr/include/Swiften/Network/NATTraversalGetPublicIPRequest.h
/usr/include/Swiften/Network/NATTraversalInterface.h
/usr/include/Swiften/Network/NATTraversalRemovePortForwardingRequest.h
/usr/include/Swiften/Network/NATTraverser.h
/usr/include/Swiften/Network/NetworkEnvironment.h
/usr/include/Swiften/Network/NetworkFactories.h
/usr/include/Swiften/Network/NetworkInterface.h
/usr/include/Swiften/Network/NullNATTraversalInterface.h
/usr/include/Swiften/Network/NullNATTraverser.h
/usr/include/Swiften/Network/NullProxyProvider.h
/usr/include/Swiften/Network/PlatformDomainNameAddressQuery.h
/usr/include/Swiften/Network/PlatformDomainNameQuery.h
/usr/include/Swiften/Network/PlatformDomainNameResolver.h
/usr/include/Swiften/Network/PlatformDomainNameServiceQuery.h
/usr/include/Swiften/Network/PlatformNATTraversalWorker.h
/usr/include/Swiften/Network/PlatformNetworkEnvironment.h
/usr/include/Swiften/Network/PlatformProxyProvider.h
/usr/include/Swiften/Network/ProxyProvider.h
/usr/include/Swiften/Network/SOCKS5ProxiedConnection.h
/usr/include/Swiften/Network/SOCKS5ProxiedConnectionFactory.h
/usr/include/Swiften/Network/StaticDomainNameResolver.h
/usr/include/Swiften/Network/TLSConnection.h
/usr/include/Swiften/Network/TLSConnectionFactory.h
/usr/include/Swiften/Network/Timer.h
/usr/include/Swiften/Network/TimerFactory.h
/usr/include/Swiften/Network/UnixNetworkEnvironment.h
/usr/include/Swiften/Network/UnixProxyProvider.h
/usr/include/Swiften/Network/WindowsNetworkEnvironment.h
/usr/include/Swiften/Network/WindowsProxyProvider.h