In addition to straightforward URL matching you can redirect based on other conditions:

• Login status – redirect only if the user is logged in or logged out
• WordPress capability – redirect if the user is able to perform a certain capability
• Browser – redirect if the user is using a certain browser
• Referrer – redirect if the user visited the link from another page
• Cookies – redirect if a particular cookie is set
• HTTP headers – redirect based on a HTTP header
• Custom filter – redirect based on your own WordPress filter
• IP address – redirect if the client IP address matches
• Server – redirect another domain if also hosted on this server
• Page type – redirect if the current page is a 404