There are several ways to avoid consolidating purchase orders to the same vendor (supplier) that comes from several manufacturing orders in Odoo:

1. Use different purchase journals for different manufacturing orders. This will create separate purchase orders for each manufacturing order, even if they are for the same supplier.

2. Use different purchase teams for different manufacturing orders. This will also create separate purchase orders for each manufacturing order, even if they are for the same supplier.

3. Use different purchase prices lists for different manufacturing orders. This will also create separate purchase orders for each manufacturing order, even if they are for the same supplier.

4. Use different purchase warehouses for different manufacturing orders. This will also create separate purchase orders for each manufacturing order, even if they are for the same supplier.

5. Create custom rules for purchase order consolidation. You can use the Odoo's rule-based automation feature to create custom rules for consolidating purchase orders. For example, you can create a rule that states that purchase orders for the same supplier should only be consolidated if the manufacturing order is the same.

6. Creating a custom module that will allow you to create purchase orders based on your requirements. You can use the purchase order creation process and change it according to your needs, this way you will have full control over the purchase order creation process.

It's important to note that these methods are not mutually exclusive and you can use them in combination to achieve your goal. It's also important to test and make sure that the chosen methods do not affect the other business processes.