It would be easy enough to implement something like this yourself by simply looping through the grid rows/cells. The only part that might be tricky would be the text highlighting within the cell. You could put the cell into edit mode and select the matching text, but highlighting the text without using selection would be a problem. There's really no way to do that in Windows Forms without either using the FormattedTextEditor for the grid cells, or else drawing the text yourself. And neither of those is trivial or ideal.  

Hello Christian,

Thank you for contacting Infragistics!

After investigating this and doing some research, implementing search functionality in the WinForms grid like the angular grid has been determined to be a product idea. You can suggest new product ideas for future versions (or vote for existing ones) at <www.infragistics.com/.../ideas>.

Submitting your idea will allow you to communicate directly with our product management team, track the progress of your idea at any time, see how many votes it got, read comments from other developers in the community, and see if someone from the product team has additional questions for you.

Remember when submitting your idea to explain the context in which a feature would be used and why it is needed as well as anything that would prevent you from accomplishing this today. You can even add screenshots to build a stronger case. Remember that for your suggestion to be successful, you need other members of the community to vote for it. You can also link back to this thread for additional details.

Thank you in advance to submitting your product idea.