A communication network may be provided having a plurality of network nodes and which may be configured to enable instantiation of different network slices which represent virtual networks with different feature sets, e.g., providing different network functions and/or having different network characteristics. The communication network may be configured to allow a network slice to be used for data communication between i) a user equipment (UE) connected to the network and configured to execute an application, and ii) a content or application server (CAS) configured to provide an application service via the network. Network functions may be provided which allow influencing the UE's slice usage based on requirements of the application service, even if the CAS is located outside the connectivity provider's network, e.g., outside a mobile operator's domain.