i want to use my indie license for some personal projects but already have a core license set up for work on this machine, is there any way to have both licenses in use on the same pc without having to log out / log in through the license administrator each time? maybe using a different houdini versions / windows users or something?

License Administrator allows connexion to multiple license servers with a priority order.

There's also multiple .exe files for each type of license in Houdini's installation directory under "bin" folder.

So, supposing that you have both Core and Indie licenses installed, when you run houdinicore.exe you will grab a Core license, and when you run hindie.exe, you wil grab an Indie license.