a hard one: asking the name to computer. Protecting macros

Hello.

I want to include in my macro a "if" sentence that
ask the computer's name, and does different things
according to it.
Something like:

if computer.name="PC_Home" then
subrutine1()
elsif computer.name="PC_Office" then
subrutine2()
else
ask_passwd()
endif

I thing there would be something like "computer.name"
or, at less, more elegant that read a text file
with a name (the second-best alternative).