Konstantin and Pierre,

Not natively there isn’t that I am aware of, but you can create a ‘user dataset’ for them if you don’t mind doing a little work – the instructions are on the Project Pluto website.  I did this for all the globulars in M33 (over 200) and it worked great.  Someone here may already have done that for the LDN’s and might be willing to share. 

Your only alternative is to look them up the old fashioned way, by RA/Dec, or by alternate name if you know it (i.e. LDN 1531 is Barnard 18). That’s the way I did a bunch recently for a list of Dark Nebula I was working on observing.  Please let me know if you come up with a dataset!

Tony.