Hi,
In the EPM help I read the following:
Local members are specific to the current report. If you want to reuse a local member in other reports for the same sheet/connection couple, you can convert the local member into a custom member. To convert a local member into a custom member, right-click on the local member in the report and select EPM> Convert to Custom Member. You can create custom members only when using a local or SAP BusinessObjects Enterprise connection.
I have tried this but there is no such option. We are on version 10.0 SP11 Patch 1