Though Phototheca has no multi-user capabilities to work with the same library over a network — you still can utilize a few features to have the workaround and particularly imitate network access to a single library.
If you have your photo’s stored on a network drive in Folder X – and if you install the software on both a laptop and a desktop or on a few PCs connected in the same network – and then make folder X to be a Live Album in all copies of the software. Then all copies will update their own libraries with files changes accordingly.
So you will be able to write keywords on the first computer and get updated keywords and do a search on the second computer later.
Another possible workaround is to put Phototheca database files to a network share and make it read-only for all users, except the one that will have write access and can make changes to the Library. In this case, you can have one master account to populate the Library and a few other accounts that can read the Library only.