Is it the case that if there are more than 4
switches/hubs between a workstation and a server that
this will cause problems for them on the network?

Thanks.

The answer is far more complicated than the question.
In case of the Ethernet, you can read
http://www.ethermanage.com/ethernet/ch13-ora/ch13.html 'Multi-Segment
Configuration Guidelines' and search the Internet about collision and
broadcast domains.