Ubuntu :: Way To Trigger Root-level Process?

I have what I hope someone finds to be a simple problem. I am running a data acquisition computer for a research project, where multiple people use the same non-privileged user account to take data and save it to /incoming. Once the file has been closed, I would like to somehow copy the data into a more permanent location owned by root. Obviously giving the shared user account sudo permission would be a huge security hole.

I know that this should be possible using some sort of client/server connection, but writing my own server just for this little task seems a bit cumbersome, and is something I have no experience with. Nor have I ever written a daemon/init script before.

Does anyone have any ideas on a simple procedure I could use? Very few things are fixed in stone, but the copy operation is necessary - the final location is a RAID5 array, and the write speeds are too slow to keep up with the data stream.

If a client/server type of thing really is the best way to go, anyone have any links to good tutorials to make a simple server and daemonize it?