It is possible in a round-about way but there is no Perform Script By Name [ by calculation ] unfortunately.
You would need to create a hard-code If/Else construct such as:
If [ table::global = "Script 1" ]
Perform Script [ Script 1 ]
Else If [ table::global = "Script 2" ]
Perform Script [ Script 2 ]
Else If ...
Also note that hard-coding these script names will mean that you will break your scripts if you rename them and don't correct the text with the quotes to match.