If you are installing on a network so that multiple users can access SIMUL8 then you need a SIMUL8 Network License. If you are installing on a network drive because you only have access to a network drive (for example on thin-clients) then you can use the normal SIMUL8 installer, but it must be run FROM the client machine that will run the SIMUL8 product.
For installing a Standalone License on a network: Click OK at the network warning message in the installer and allow the installer to continue. Only one user, from the one client machine, will be able to access the SIMUL8 installed on the network.
For installing a SIMUL8 Network License: please read the Installation Guide here.