https://www.ptc.com/appserver/cs/view/solution.jsp?n=CS31918
Add syntax MAX <num_lic> <feature> <type> <name> into ptc.opt file
num_lic - Usage limit for this user or group
feature - Feature or package this limit applies to
type - One of USER, HOST, DISPLAY, INTERNET, PROJECT, GROUP, or HOST_GROUP
#Limit license usage to one per user
GROUPCASEINSENSITIVE
HOST_GROUP PARAMETRIC_USERS <list of host names or IP addresses>
MAX 1 PROE_FoundationAdv HOST_GROUP PARAMETRIC_USERS
Restart the license server Windows service: lmadmin_ptc