Citation: 4A_596/2012 E. B

B.a. Mit Eingabe vom 13. Oktober 2010 reichte A.________ beim ICC-Schiedsgericht gegen die X.________ (International) AG eine Auskunftsklage (Rechtsbegehren Ziff. 1) sowie - in objektiver Häufung - zwei Forderungsklagen (Rechtsbegehren Ziff. 2 und 3) mit folgendem Wortlaut ein: "1. Order Respondent (...) to hand out the full reporting (revenue overviews, invoices, etc.) concerning all sales numbers as follows: (a) from August 2004 until April 29, 2006 the territory of Germany, Austria, Switzerland, Liechtenstein, Belgium, Netherlands as well as Luxemburg; (b) from April 30, 2006 until August 31, 2009 on the territory of Germany, Austria, Switzerland and Liechtenstein; in particular the full reporting concerning the sales activities with regard to (c) B.Y.________ AG with its registered office in K.________, Switzerland (respectively C.Y.________ AG with its registered office in L.________, Switzerland, D.Y.________ AG with its registered office in M.________, Switzerland, E.Y.________ AG, with its registered office in K.________, Switzerland, and F.Y.________ AG with its registered office in K.________, Switzerland) (altogether hereinafter "Y.________ AG") and (d) Z.________ AG with its registered office in P.________, Germany (hereinafter "Z.________ AG"), during the above mentioned period.