The phrase "acting as proxy for" is correct and usable in written English.
It can be used in contexts where someone is representing or substituting for another person or entity in a specific role or function.
Example: "During the meeting, she was acting as proxy for her manager, who was unable to attend."
Alternatives: "serving as a representative for" or "representing on behalf of".
Thai government prosecutors, acting as proxies for their American counterparts, immediately said they would appeal.
It supports Hezbollah and Hamas, both sitting on the front line against an American ally, both acting as proxies for Iranian influence in Lebanon, Syria and Palestine.
Each side in turn accuses the other of lacking true grass-roots credentials — of acting as proxies for governments — and each denies it.
There was no evidence of ties between the fisherman and the Chinese Navy, but analysts say Chinese civilian boats have been increasingly acting as proxies for the navy by trying to assert Chinese sovereignty in disputed waters.
Salgado's extraordinary story has unfolded amid a fierce debate about the role of armed vigilante groups that have sprung up across the country to fight the cartels, but have themselves been accused of murder, extortion and – in some cases – even acting as proxies for rival crime groups.
BEIJING — The diplomatic discord set off by Japan's recent detention of a Chinese fishing trawler captain points to what foreign military officials say is a growing source of friction along China's borders: civilian vessels plying disputed waters — and sometimes acting as proxies for the Chinese Navy.
It is obvious that those acting as proxies for the dead in hundreds of thousands of posthumous baptisms, have no way of determining whether or not the dead people being baptized were openly and gaily married or were children of gay parents who refused to disavow their parents' life styles.
Some of the structural and process of care factors used in the model may themselves be acting as proxies for volume.
Perhaps the LASSO and RF techniques did not find cognitive impairment to be predictive because other variables, such as client belief in potential for improvement, are acting as proxies for adequate cognitive function.
Based on the regression analyses, it appeared that immigration and language variables were acting as proxies for socioeconomic status to some extent; however, the coefficients for the less acculturated Hispanic subgroups generally remained significant even after controlling for socioeconomic measures.
