How to address multiple BIG-IP servers in one Ansible task?

Resolved: the answer is to use the "inventory_hostname" variable like this:

tasks:
   - name: Create app1 server pool
     bigip_pool:
      name: app1_pl
      monitors: "/Common/http"
      lb_method: round-robin
      password: "adminpassword"
      server: "{{inventory_hostname}}"
      user: "adminuser"
      validate_certs: no
     delegate_to: localhost

This will cause Ansible to loop through the servers in the inventory/hosts group that we pass it. In my case the group is called "f5lab".