Not easily. Diaspora was designed for a single player and although the missions can be converted it requires quite a large amount of FREDding knowledge to do so. If you have that and are interested in making a conversion, I'd be more than happy to work with you on it. If not, I have started the process but due to a lack of feedback and the fact I now only have one PC, I haven't been able to do much recently. If people want to give me feedback, I'd be more than willing to do the whole lot.
You can find the one mission I did convert here
. If it works with a recent build, excellent. If not, tell me what errors you get and I'd be happy to look into it.