Python Code:
if self.company_id.company_registry == 'HQ':
search_fields = [('stock_date','=',self.start_date)]
else:
search_fields = [('stock_date','=',self.start_date),('loccode','=',self.company_id.company_registry)]
action = self.env.ref('ls_pos_reports.ls_hq_stock_attribute_view').read()[0]
action.update({'domain':search_fields})
return action

XML View:
<record id="ls_hq_stock_attribute_view"
model="ir.actions.act_window">
<field name="name">Stock Attribute</field>
<field name="type">ir.actions.act_window</field>
<field name="res_model">ls.hq.stock.attribute.view</field>
<field name="view_mode">tree,pivot,graph</field>
<field name="target">current</field>
</record>
<record model="ir.ui.view" id="ls_hq_stock_attribute_tree">
<field name="name">LS HQ Stock Attribute Tree</field>
<field name="model">ls.hq.stock.attribute.view</field>
<field name="arch" type="xml">
<tree string="Stock Attribute" edit="false" create="false" delete="false" export_xlsx="false" class="mytree">
<field name="stock_date" optional="show" />
<field name="loccode" optional="show" />
<field name="name" optional="show" />
<field name="dept" optional="show" />
<field name="category" optional="show" />
<field name="subcategory" optional="show" />

</tree>
</field>
</record>