Multible Ports inside a Table ?

If you have unique yellow, green and blue objects for each Tabelle row (so 12 different objects in this Tabelle), that would be possible. Turn on 'Use subobjects as ports' in each of the three Templates on the right in the Symbol Editor for Tabelle, and specify there how to get from the Tabelle to that column's list of unique objects.

If however you don't have a unique objects existing for each of the 12 dots, then there isn't really a basis for using them as ports. The connection to a Tabelle has to know which port it's going to, so you can't reuse the same port. But the good news is you probably don't need to here. You already have enough information in what you are connecting - if it's a Validierung, you know it's a blue port. 

In that case, just have the role connect to the row in the Tabelle: the row will be the port, maintaining the information of which row the connection is for, and the Validierung or other object provides the information of what kind of connection this is (yellow, green or blue). To do that, turn on 'Use subobjects as ports' in the Template for the rows. You can get rid of the three Template columns on the right. This is then quite similar to the 'Class diagram with Ports' example in the demo repository's Port examples project. If you like, you can use the same approach as there, with one Template to show the rows (not used as ports) and a second Template to act as ports. 

Since your roles already have the colour (yellow/green/blue), I'm not sure you need dots. If you want them, they could be as circles at the end of the role line. You can put them at different distances from the end, so they don't overlap each other if there are several to the same row. 

It would be interesting to know what kind of semantics you're trying to capture here. You probably want to consider whether having 1-3 connections to each row could be hard to read. But that's the nice thing of a tool where you can play around with your ideas: you can quickly see what works visually for the common kinds of models, as well as giving the necessary information.