Add the logic for VPCs, Subnets and Regions. The idea is to have a Grouping between resources that belong to the same VPC, Subnet and/or Region.

On AWS reading the TFState/HCL we are able to know if some resource belong to those:

• VPC: vpc_id and vpc_security_group_ids.
• Subnets: TBD
• Region: TBD

The idea would be to add a Groups on the provider.Provider that does the same as ResourceInOut that returns which groups the resource belongs to and then from that extend to different Providers bit by bit.