Hi,
Try below logic
DATA : lv_cnt TYPE int4.
SORT itab1 BY user terminal.
LOOP AT itab1 INTO lwa_itab.
wa_itab = lwa_itab.
AT NEW user.
* Clear the variable for every new User
CLEAR : lv_cnt.
ENDAT.
AT END OF terminal.
* Increment the counter after end of terminal
lv_cnt = lv_cnt + 1.
IF lv_cnt > 1.
* If user logs in morethan one terminal lv_cnt will be GE 1
APPEND wa_itab TO itab2.
ENDIF.
ENDAT.
CLEAR : lwa_itab, wa_itab.
ENDLOOP.
itab2 will have ur required list.
Thanks & Regards
Bala Krishna