As ibmtech said above, filesystems belongs to VGs and thouse VGs are part of a 'Resource group' inside powerHA/HACMP.
/usr/es/sbin/cluster/utilities/clshowres shows which VGs you're sharing, see...
I suggest not to do that.. you can use rbac(for AIX 6.1), create your roles and assing roles to other users. They have same authotity as root and it's safer thinking in security stuff....