Created a work flow and give the basic details name,id
Select record type as transaction and sub type as sales order.
Here we want to set context as webstore then this work flow triggered only when an order created from webstore.


Work flow action
we can give condition here.
Here we give condition for customers from Australian domain
Record set as customer. Field to check should be subsidiary and compare type set as “any of” and Selection as THERMOGUARD AU.
For New Zealand domain
Record set as customer. Field to check should be subsidiary and compare type set as “any of” and Selection as THERMOGUARD NZ.
For USA domain
Record set as customer. Field to check should be subsidiary and compare type set as “any of” and Selection as THERMOGUARD AU.

This workflow triggered when an order placed from webstore and send Email.