Restrict the attachment at certain status of the workflow

In Stat, We have a option to attach the document at any level of migration phase till CSR Completed. But we need to restrict the user document attachment in Workflow basis.

Because some scenario I have faced on this issue, After the migration some user will update the new deployment document that will lead us audit issue.

If STAT 6.2 have any functionality to avoid this issue or how to Restrict the  attachment at certain status of the workflow.

Thanks,

Suresh Manickam