Is it possible to bind Domination/ÜberCharge lines or not?

Solution 1:

If i understand your question you want to bind a specific phrase from the voice menu to a certain key using the command console. You can do that in this way:

e.g. Need Dispenser = bind <key> "voicemenu 1 4"

e.g. Thanks! = bind <key> "voicemenu 0 1"

But you can't single out a single type of response from the selection.

e.g. You can't choose between Thanks! or Thank you! when using the command mentioned above.

It may be possible to do this with a script though but from what i know it would still generate some kind of a random response.

In Left 4 Dead it was possible to select a certain response from the list.

EDIT: You can't bind the voice responses triggered by events to a key, only those from the voice menu.

Solution 2:

Unfortunately, you can't do this at all with Domination lines (the line a character says when he's dominating someone), because those are event-specific lines. Similarly, I assume when you say "ubercharge line", you mean the line for when an ubercharge is activated/active, rather than the line for when you want to inform someone of a fully-charged uber. This too is not possible, because it is an event-driven line.

Without some kind of server-side plug-in, these lines are only spoken during the key event. There might also be certain plug-ins you can do to activate the specific line on your side, but no one else on the server would hear it/it wouldn't affect their computer.