OrgVue 2 retains a record of who made what changes to a dataset. (Note however that this information is not available for a branch.)
To access the audit log navigate to the Worksheet view and then right click anywhere on the canvas to reveal a dialogue box with a set of options : -
Select the 'Retrieve audit log' option and then choose the date range and click 'Retrieve' : -
This will place a csv file with the audit log data onto your machine.
The data in the csv file lists 'create', 'update' and 'delete' actions along with the Unique ID of the node which has been adjusted, though note that the ID cannot be returned for a deleted node.
Along with the Unique ID you will also see the value(s) in the node which have been created/updated.