In some examples, a method includes receiving, by an orchestrator for a virtualized computing infrastructure, namespace specification data the specifies a namespace, a first virtual network for the namespace, and a second virtual network for the namespace; sending, by the orchestrator to a network controller for the virtualized computing infrastructure, based on the namespace specification data, at least one request to create, for a virtual execution element to be deployed to the namespace and instantiated in a computing device of the virtualized computing infrastructure, respective virtual network interfaces for the first virtual network and the second virtual network; and send, by the network controller to the computing device, interface configuration data to configure a first virtual network interface for the first virtual network and a second virtual network interface for the second virtual network.