In Release 3.0E, there is a USER exit available for checking selection conditions during line item display.
The system provides the selection conditions with which the line item display was accessed.
Therefore, you can request the user to enter selection conditions if these are not entered but are necessary due to performance reasons (account has many items).
The documentation for function module EXIT_RFEPOS00_001 describes the interface. A customer enhancement can be made using transaction CMOD to extend RFEPOS00 and is then programmed in include ZXF11U01.