Hello Deepak,
You may want to consider using one of the fields on the Administration tab in FTR_CREATE such as Assigment or Internal Reference.
The fields Assignment (ZUOND) and Internal Reference (REFER) are in table VTBFHA. These fields can also be found in logical databases such as FTI_TR_PERIODS and FTI_TR_POSITIONS in the event you need to create ABAP queries.
In addition, both of these fields are available at transaction code TPM12 Subledger Positions.
Good luck,
Lisa