I would say no, as that is client side and plugins are server side. I don't use minimaps, so I can't say for sure, but perhaps if you were to turn down the view-distance to a very low value in server.properties. However, this would probably also restrict people from seeing very far. Let me rephrase: I don't think that it is possible to prevent people from making a minimap of what they can see in first person mode.
I agree with atomic. Although it is possible clever use of spoutcraft may be able to help disrupt a minimap, 9I highly doubt it. The minimap display's the top block of each coordinate in the chunk of what the client has received from the server.