Can I add a personal, separate table for an employee?

Yes. First, create a table with the required columns and filters. Learn how to do this here.

If you haven't created an employee in the service yet, add one. See instructions for creating an employee here. If the employee has already been created, open their settings. Select the Can view own tables checkbox. Then, from the list of tables, select the table you created in the first step.

Here, you can also specify which actions the employee is allowed to perform with orders.

In the table, you can add a trigger button for the employee. Read more about this here.