[TYPO3] Typoscript - get domain name

[Brian Bendtsen]

Hi

Is it possible to do something like this in Typoscript:

if domain name = mentor-it.dk then
plugin.tx_lumogooglemaps_pi1.google_api_key = 
ABQIAAAA_UBe0G6chCGKq1CbqlhqxhRHzN24XrT61zA8MWVZbIlBTY9zUxRpfc-ae7cTqXQEDvDGNTXN4N98sg
else if domain_name = mentorit.dk then
plugin.tx_lumogooglemaps_pi1.google_api_key = 
ABQIAAAA_UBe0G6chCGKq1CbqlhqxhRDdQEaujmDR_Jv1A-YKViph57DuhTz2d5mNrYaD9j_2t72aWAmMVpmXw

I know how to make an if-else, but is it possible to get the domain name 
  by which the user has reached my site?

/Brian