> How can we raise the bind capability of a process
> so that we can bind on the privileged port and latter
> lower the bind capabilty of the process.

Well, first you'd implement a generic capability processing scheme.
Then...   :')

Unfortunately, the only way you can do this now is to make the
executable setuid root, have the process acquire the port, and then
relinquish the root privileges.

			       _MelloN_