Blocking access to web pages by a list or keywords

Requirements to the program: 1) Blocking of web pages: - by full URL - by partial URL (by mask) - by keywords 2) The ability to block the Internet completely 3) Cross-browser compatibility. 4) Operating Systems: Windows XP 32-bit and 64-bit Windows 7 32-bit and 64-bit Windows 8 32-bit and 64-bit 5) Technology: any, excluding changing the file "hosts" 6) Programming Language: Delphi 2010 7) Running without administrator rights (user level), tolerance from anti-virus software --------------------------------------------------------- To demonstrate the functional: We need a Delphi application with - field to enter an URL - field to enter a keyword - buttons: "block", "unblock" --------------------------------------------------------- As a result of the work we need a functional source code.