HI,

You can try to achieve as follows, if you see the record rules of the model account.move, there will be some record rules assigned for portal users.

You can change the domain of record rule to show only records after that date. Along with current domain , add [('date_field', '>', '2023-06-30')]

This is the way by which you can achieve it from ui, if you are not preferring to add some custom codes

Thanks