I seem to remember on a server I had bitd that if I had already entered a players name, say, to do /whois, I could use an abbreviation to use it again to, say, /up that player? do you know what I am talking about?

That is on fCraft based servers and it is a hyphen, -

 

OK thanks, I tried and I don't think it works on the server I am on, shame really.

I wonder if there is a similar command on mcgalaxy?

 

 

I don't know if it helps you at all, but I very commonly run into this situation myself where such a feature would be useful. My solution is to first type that player's name in chat on its own, then ctrl + c to copy it to clipboard, then perform all the commands I need with their name ready to paste multiple times.