For a long time, the concept of cognitive coordination and control has not been applied to social cognition and mentalizing. Mainly because mentalizing tasks were rather easy and not performed with varying task difficulty (i.e., cognitive load). However, we could show in an EEG study that the coordination of briefly maintained information (i.e., working memory) during cognitively demanding social tasks was implemented with the same phase-amplitude coupling mechanism as shown for visual working memory tasks: Depending on the effort necessary for cognitive operations, the phase of slow frontal oscillations was used to precisely tune communication with posterior brain areas in both, social and visual working memory tasks. Thus, our findings revealed a phase-amplitude coupling mechanism to be responsible for successful social and visual working memory by tuning the fronto-parietal network depending on load. This was true for participants having low autistic personality traits. However, participants with high autistic personality traits struggled with efficient tuning of fronto-parietal networks. We suggest that this coupling mechanism can explain how communication between distant brain areas is effectively controlling cognitive functions and might even explain cognitive and social deficits in mental disorders.