You can use quotas to allocate per-user and per-group quotas on VxFS file systems.
See Using quotas.
See the vxquota(1M), vxquotaon(1M), vxquotaoff(1M), and vxedquota(1M) manual pages.
vxquota
vxquotaon
vxquotaoff
vxedquota