Can different TeXworks users, working in a network, have a central place for storing the Hunspell dictionary, instead of all having a local copy on their computer? The reason is we need to add new words to the Hunspell dictionary. That would be much easier if we have only one copy of Hunspell in the network.
Judging from TeXworks in MiKTeX 2.9 and TeX Live 2012 under Windows I would say it is not possible.
It would require a rewriting of sources, because at the moment the path seems to be hardcoded: one can only choose between dictionaries in different languages, but not the actual underlying files and their path.
In fact, in the version of TeXworks distributed with TeX Live I cannot even select a single dictionary, because they seem not to be included and they have to be added manually from each user.