It is now possible to create multiple separate Programmes under one project. To do so, go to Project-> Programme and from the drop-down menu select the Programme you want to update or + Create a New Programme. 

You can switch between the programmes any time you want. The timesheet view doesn't change so when you assign a person to a programme, they will still see it as a list of tasks. 

The Manage Programmes option lets you edit the name of the programme or delete it.