Hi Tarun,
I do notquite understandwhat you need, but in my understanding you can check the 3 options:
1 - Customer Tables
BUT000
BUT020
BUT050
BUT051
BUT0BK
BNKA
BUT100
2 - HR tables:
HRP1000
HRP1001
3 - Check class executions:
You can check the method get_assignments_of_user of class cl_crm_ppm_um_toolkit.