Microstation - floating license

Hello

In my company we have two floating licences (avaliable for any user in organisation) for two full-time users and couple of occasional users. The general rule says that those occasional users must ask full-time users before launching Microstation, but sometimes messages disappear or someone forgets to ask. As a result we have three active users for two licenses what costs hundreds of $, even if it lasts for couple of minutes. Is there any application that prevents third user from launching Microstaion?
PP