Use the Confluence Custom Space User Management Plugin to allow delegated group administration.
Existing Groups
bamboo-admin bamboo-user BScullyAndAPetroAdhoc cas-admin cas-clients-devs cas-contrib cas-devel cas-extension-devs cas-server4-devs cas-server-devs channel-devs clearinghouse-admin clearinghouse-developers conference-committee-spring-2008 confluence-administrators confluence-users crowd-administrators gap-admin incubation-committee infrastructure jasig-board jasig-ch jasig-icla jira-administrators jira-users licensing-admin openregistry-admin openregistry-devs portal-prog-committee portlet-devs requirements-committee uportal-admin uportal-developers uportal-devs uportal-doc-contrib uportal-doc-leads uportal-steering-committee website-developers