Not sure if this is possible or not in Cisco Packet Tracer - can I set up users with different access permissions, e.g. different access rights to READ ONLY or READ/WRITE on a server (accessing/logging in from a workstation to that server)?

I've been working through these instructions (https://computernetworking747640215.wordpress.com/2018/07/05/how-to-configure-dhcp-server-in-packet-tracer/) - setting up a DHCP server. For some reason, even if I set the DHCP service with a Start IP add...