Can use RBAC for grant privilege to user on specific directory or not?

If I want user "aaa:group1" to have write privilege on specific directory of user "bbb:group2" (such as /export/home/bbb).

Can I use RBAC Feature for this case? How to?

Because basic permission of Unix very large scope (user, group, other).

If I specific folder "/export/home/bbb" to rwxrwxr-x, then change group of user "aaa" to group2. Other user in group2 will have write privilege too.

Thank you.

[431 byte] By [aplus2u] at [2007-11-26 11:17:37]