For the whole project; right click
on the project name
in the Projects pane, then go to Subversion->Search History...
In the opening window for the seach options enter nothing just press Search button at right below. For a specific period entering revision or date will be reasonable.
The history of a single file one can use following info:
In Netbeans, right click on the filename at editing pane. Then select
History-> Show History
Another very handy option is :
Right click on the file from projects pane or Editing pane-> Subversion-> Show Annotations
a few seconds later you will see the names of commiters of each line. When you come across the name you will see the commit log.