Hi Anuradha,
You may try transaction OB32 where for a particular account type you can specify the field that you would like to restrict the changes to be made.
I believe in this case
1. Account type = K (For vendor)
2. Field = BSEG-ZFBDT (Baseline date)
Specify the stipulations and company code restrictions as needed.
Please note that this is not to a specific user or group. once it is applied, it is applicable for all.
Hope this helps.
Thanks,
Siva Cheruvu