I've set up a simple tree view, which was pretty easy, but now I want to restrict the items in that tree view based on something like a domain. More specifically, I've created a page so users can view past timesheets (from hr_timesheet_sheet), but I only want them to be able to see their own past timesheets in the tree view. The basic tree view is like this:

    <record id="past_timesheet_tree" model="ir.ui.view">

        <field name="name">hr_timesheet_sheet.sheet.tree</field>
        <field name="model">hr_timesheet_sheet.sheet</field>
        <field name="arch" type="xml">
            <tree string="Past Timesheets" create="false" edit="false" delete="false">
                <field ... />
                <field ... />
            </tree>
        </field>
    </record>

Unfortunately it looks like I can't add a domain attribute to the <tree> tag. Also, I don't want to just create a default filter, because then users would be able to remove that filter and see all the timesheets. I need this view to completely restrict users to only view items that belong to them. I can't think of any examples of where this happens in the system, so I'm hoping someone here will have an idea.

(On an unrelated meta note, I indented my code block with 4 or more spaces, but I'm not getting code formatting. Is there something else I can do to put it in a code block?)