- name: compile
  hosts: localhost
  gather_facts: false
  tasks:
  - name: compile binary
    local_action: command make build FOO=foo1

- name: compile binary
    local_action: command make build FOO=foo1
    when: (inventory_hostname != "bar-1") and (inventory_hostname != "bar-2")
  - name: compile binary
    local_action: command make build FOO=bar1
    when: (inventory_hostname == "bar-1") or (inventory_hostname == "bar-2")

[foos]
foo-1 ...
foo-2 ...

[bars]
bar-1 ...
bar-2 ...

ansible-playbook -i provision/hosts -l localhost,bars provision/deploy.yml

shell: echo {{ inventory_hostname }}
   run_once: true
   delegate_to: localhost
   when: "'bars' in group_names"

---
- hosts: localhost,test-server
  gather_facts: no
  tasks:
    - shell: echo {{ inventory_hostname }}
      delegate_to: localhost