yes by using SET PARAMETER ID <PID> <field>

SET PARAMETER ID <pid> FIELD <fieldname>.

If you want save ITAB in sap memory then you have to use 
IMPORT nad EXPORT statements

The followin exapmles will explain how it will works
Here i created two report progrmas

1==> ZSHAN_EXPORT_ITAB ---> TO EXPORT THE ITAB INTO SAP 
MEMORY

2==> ZSHAN_IMPORT_ITAB ---> TO IMPORT THE ITAB FROM SAP 
MEMORY

---------------------------------------------

REPORT  ZSHAN_EXPORT_ITAB.


DATA TEXT1(10) VALUE 'Exporting'.

DATA ITAB LIKE SBOOK OCCURS 10 WITH HEADER LINE.

DO 5 TIMES.
ITAB-BOOKID = 100 + SY-INDEX.
APPEND ITAB.
ENDDO.

EXPORT TEXT1 TEXT2 FROM 'Literal' TO MEMORY ID 'text'.

EXPORT ITAB TO MEMORY ID 'table'.

--------------------------------------------------------

===========================================================

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REPORT  ZSHAN_IMPORT_ITAB.

DATA: TEXT1(10),
      TEXT3 LIKE TEXT1 VALUE 'Initial'.

DATA JTAB LIKE SBOOK OCCURS 10 WITH HEADER LINE.

SUBMIT ZSHAN_EXPORT_ITAB AND RETURN.

IMPORT TEXT3 FROM MEMORY ID 'text'.
WRITE: / SY-SUBRC, TEXT3.

IMPORT TEXT2 TO TEXT1 FROM MEMORY ID 'text'.
WRITE: / SY-SUBRC, TEXT1.

IMPORT ITAB TO JTAB FROM MEMORY ID 'table'.

LOOP AT JTAB.
WRITE / JTAB-BOOKID.
ENDLOOP.
-----------------------------------------------------


I hope this information will help full.......