When you connect locally to a data-source in the Disclosure Management client, you will get the sources defined in the 'config20.xml'
The problem with this is, that the file is stored locally (in %APPDATA%\cundus AG\cundusBIPublisher)
This obviously means, that user1 does not see the same data-sources as user2
To avoid this, you can have a central 'config20.xml' file (note: this is effectively the same as using a server connection)
For more details, please refer to:
https://wiki.scn.sap.com/wiki/display/CPM/Sharing+Data+Sources+in+Disclosure+Management