Sorry I didn't notice your role before posting my first and very broad response.
As the other posters have indicated, if you send the file to the client, there's little you can do to thwart copying or abuse of the document.
In order to meet your criteria, you may work with your IT department, and they can create a terminal services session that will allow the client to log into your network where he will have only the access that you specify (I suggest of course a COPY of the document for their editing). This terminal services session can be configured to disallow all of the clients' local resources including local disk drives AND printers. You can even disable the clipboard so they can't copy/paste from the TS session to their local desktop. If necessary, you can also have the client's access limited to certain time of day and you can "shadow" their session to see exactly what they're doing. This may be extreme, but I want to give you a taste of the features so you know what's available and you can decide what to ask for.
Once the edits are finished, you may disable the client's access, compare the client-edited version to the Production version, and decide if you want to incorporate the edited version.