conditional formatting: is value in a table

Hi out there,

I have a column that I want to format conditionally as follows: If a cell in the same row contains a text (e.g. "dummy1") that is also in a table consisting of e.g. 12 colums, I want the cell to get red.

I can do this, if the "checking table" consists of only one column, but not for more.

Any suggestions?