mind that the limit of the windows' shared folders has nothing to do with hfs.
All the limits of HFS that are not of the machine, are listed (enabled and disabled) in the Menu > Limits
if one option is not enabled then you should not expect it to be affecting in any way.
The only limit that's enabled by default is the "prevent leeching".
If your users are all from the same IP address (because their connection comes from the same NATed LAN), then it will affect them. If it's a problem for you, you can just disable it.