I was wondering if it is possible to color code a dialog using tables? Or any of the above.

To colour a dialogue you need to use an 'icon'.

to color code .. say I want to pull information, bot nicks, channels.. etc into a table, and color code it according to the channel.

channel 1 - bot 1 - orange
channel 2 - bot 2 - green

possible?

As far as I know colour is not available at all for dialogues unless you use a DLL designed for the purpose. There's one called MDX.DLL but I've never used it so I don't know it's feature set.

As for 'tables' that is just the name the dialogue is called when called in a remote script.
The bit in red is the table.

From the mIRC help file:
The dialog table
You can use the dialog prefix to create a dialog table called name in a script using this format:

dialog [-l] name {