File sharing is supported in the client (non-server) OS. Simply enable file sharing in the Sharing preferences pane. You can support up to 10 client connections - mac or pc. Once you've enabled File Sharing it should be obvious where in the interface you can add folders you wish to share and what permissions you wish to set.
Apple have a number of support articles you may find helpful?
This support article is for PCs connecting to a share enabled on a mac: