Since the license you purchased is a domain license, so it will only work for a domain name registered. A domain license allows one domain name only.
If you know the IP address of the server and all your sites share the same IP address, the IP license is a good choice. It allows multiple sites as long as they share the same IP.
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx