If you want to bypass the configuration of the RES Workspace Manager 2012 agent on  a client (which is given by DHCP). Please read the following instruction:

To set a specific Agent to ignore the DHCP information, set the registry key:

HKEY_Local_Machine\Software\RES\Workspace Manager\DisableDHCP

in the registry of the Agent, with value “True”, “yes” or “1”.

Reference:

https://support.ressoftware.com/workspacemanageradminguide/17742.htm