aws.find-vpc

---
- set_fact:
    myenv: "{{ env }}"
  when: myenv is not defined

- name: "Find {{ myenv }} VPC id"
  ec2_vpc_net_facts:
    region: "{{ region }}"
    filters:
      "tag:Name": "{{ owner }}_vpc_{{ myenv }}"
  register: aws_find_vpc_facts

group_vars-all

env_devmgmt_name: "devmgmt"

meta-main.yml

---
dependencies:
  - { role: aws.find-vpc, env: "devenvs", when: env == env_devmgmt_name }

Playbook

---
- hosts: localhost

  vars:
    env: "{{ env_devmgmt_name }}"

  roles:
    - aws/create

pre_tasks-Output

TASK [debug] *******************************************************************
ok: [localhost] => {
    "env": "devmgmt"
}

TASK [debug] *******************************************************************
ok: [localhost] => {
    "env_devmgmt_name": "devmgmt"
}