If the match text information is different, then it qualifies as a different event...but be careful with the order that you place them in, especially if you're using wildcards in the match text.

Another way of differentiating between similar events is with event prefixes, also known as User Levels.

For example, the following would respond no matter who used it in the channel
Code:
 ON *:TEXT:!hello:#:{  .msg $chan Hi $nick } 

This next line would only respond if the person running the script was opped
Code:
 ON @*:TEXT:!hello:#:{  .msg $chan Hi $nick } 


Read up in the help file about the different ON events (ie: ON TEXT, ON NOTICE, ON ACTION, etc....and there's a lot more of them)

If you still need help, be more specific with what you're wanting to do, and I, or someone else, will be happy to assist you.