I 've used V-Control and what I can tell you is that you can't really compare the two apps. V-Control is a Mackie Emulation control software. Lemur is an app with which you design your
own control surface.
To make a better comparison of the possibilities, with Lemur you can build (function-wise, not visual-wise) your
own V-Control (here's one for Cakewalk's Sonar, to get an idea,
http://liine.net/en/community/user-library/view/342/)
...and then add XY Pads, Keyboard or what have you in it.
The virtual window of V-control, good as it is, it's not multitouch - with Lemur you can create custom surfaces for any/all of your instruments and plug ins - and they might not be visually representing the UI of the plug in (which sometimes, its not even usable as touch surface) but they retain the multitouch nature, plus they can add up to the functionalities of the synth-effect plug in, by having ways to interact with it, not posible with its factory UI (think about adding XY controls to synths that dont have any).
That said, and in order to do justice to other apps, while they are "plug n play" sort of thing, you need to invest some time in Lemur to actually learn how to code-script certain functions - its more deep as an app, but also takes time to comprehend and take advantage of its versatility.
As for what you have asked, I do not own DP and cannot know the details, but if the function you want to control, is midi-mappable or has at least a keycombo available in DP for it, then most likely Lemur can handle it.
Does anyone have experience with using Lemur for this? So to be clear - Recording onto another track is not the problem I'm trying to solve. I want to record onto the SAME track using the "new take" feature so that I can comp the takes once I'm finished recording. Anybody? 