Lunix Apache Mode URL Script

We are looking to enhanced our Security/Protect Bandwidth/Spammers with a SERVER BASED (maybe though apache and mod_rewrite) Masking/Cloaking URL script which in constantly showing the mask URL regardless of where you move/click within the site. Clarification: If I have an address: "http://www.mysite.com/mypage.htm" Mask Url would always say "http://www.myname.com" Responsiblly would be (A) Install application on 1 Web Site/ or Server (B) Must me compatible with Linux Server Client/CPanel. (C) Explain/write direction for reused/ or how this was done. NO script such as a main index or java ([login to view URL], [login to view URL], [login to view URL] or [login to view URL] etc) Please explain if you can do this on 1 Web Site/ or Server(would if effect other sites?), may lead to other projects. Thanks AGS