Please refer to this webpage on how a workstation/client user can borrow / checkout concurrent license for a certain amount / period of time:  https://documentation.statsoft.com/STATISTICAHelp.aspx?path=Common/AboutSTATISTICA/BorrowingLicenses 

This article shows how to switch off borrowing function globally so that all users can not borrow Statistica license.

Windows - with Concurrent or Enterprise installations

An options file can actually be used to deny all borrowing for concurrent licenses.

1. Please follow instructions in this article https://support.tibco.com/s/article/Statistica-license-access-management-using-the-FLEXlm-Options-file, and make an option file with below content: 2.  Save the option file in the FLEXlm folder and name it sta_flexlm.opt (.OPT extension)
3.  Add options line in license file (stat.lic in FLEXlm folder), below the VENDOR line, and Save the license file: 4.  Restart the Statistica License Manager service from Windows Control Panel > Services
5. The workstation users will get below message when they try to borrow the license:

deny/turn off license borrowing globally for all users for concurrent licenses