Hi Manish,
I've created a small test scenario.
1 - Created a new status NAA (like yours). In this case I check FI Postings as forbidden.
2 - Then, I assigned the User Status Profile to the Project and set User Status NAA in WBS P239-01
3 - To test if the business transaction not allowance was working, I just tried to post a FI document. As you can see the system checked the user status definition of WBS and raised na error.
I suggest you to check the user status business transactions. You have to test each one what fits your requirement,
Regards,
Glauser