I noticed that GIMP does not allow multiple layer select currently. There are some plugins that reproduce some of the functionality that multi-layer select provides, but I would like to actually be able to do multiple selections.
A bit of Googling seems to suggest that there are no plans to implement multi-layer selections. Instead, there seem to be a bunch of inconvenient workarounds. I also remember reading somewhere that, "If you want this feature, implement it yourself." I'm afraid this might be a very daunting task for myself (since I have only taken some introductory courses to C and C++, I am not familiar with the finer details of open source code, and I haven't done it before etc. etc.), but I'm not afraid to dive in to take a look around.
Any guidance for me (whether that would be to download the source code, look at which files, etc.)?