Is there a way to lock Receivables from changes while reconciling for period close?

I'm searching for a solution to prevent transactions or adjustments from being entered in the system after our final Submit Accounting, but before the period is closed.  Ideally this would be something that could be switched on or off at the user level -- for instance, through the accounting calendar if there was a "Pending Close" option that locked the period from new JEs/postings, but did not close the period.  Is there a way to temporarily lock the system from changes for a period of time to prevent new data?