An About Activity Plugin provides views of recent changes. However by default this provides a view of the Recent Changes in the neighbourhood.
To create a view of the changes for a particular site (or group of sites), we link the activity plugin to a About Roster Plugin.
For instance the following markup in an ACTIVITY plugin shows only changes to the sites listed in the roster labeled "Strange Authors". See Strange Changes to view the result.
ROSTER Strange Authors CONVERSATION
In order to refer reliably to a particular view of a sites or sites we must take some care in how we organise things. We want a fixed view and this is not easy to achieve.